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DIY Stompboxes => Building your own stompbox => Topic started by: anchovie on October 10, 2010, 02:19:57 PM

Title: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 10, 2010, 02:19:57 PM
Here's a fun little circuit that I put together this morning. After seeing so many attempts to make the PT2399 sound as clean as possible, I decided to use one with an extreme amount of fuzz and lo and behold the external parts count becomes much smaller when you have less filtering to worry about!

The chip's input stage is set up as a comparator with the aid of the Vref pin, so that gives us an ultra-amplified, squared-off waveform straight away. This squared signal is also used to modulate the delay time (controlled by a 22K pot - anything higher than this made the delayed signal fall apart when modulated). The chip's output stage used to mix the initial fuzz signal with the delayed/modulated version at a fixed 50/50 ratio.

I've called the delay control "Shambles" because as you turn the pot clockwise not only does the delay increase but also the amount of pitch wobble. At small settings, some interesting effects can be heard such as flanger-style sweeps on sustained chords and doubling. There are some obvious mods that can be done if you want this circuit to have more controls, such as adding a blend pot or ditching the 10nF cap and having your own tone control after the output stage.

Soundclips to follow, once I get the chance to record something - if you're itching to hear it, it doesn't take long to get it set up on a breadboard!


Schematic:
(http://i52.tinypic.com/2h4ex08.gif)

Layout (currently unverified):
(http://i51.tinypic.com/14scry1.gif)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 10, 2010, 02:26:15 PM
Eagerly awaiting clips.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Taylor on October 10, 2010, 02:54:58 PM
Ditto, I like this idea. There are a lot of interesting uses for the 2399.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: frequencycentral on October 10, 2010, 04:32:40 PM
I'm hooked. I wanna hear it. NOW.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Slade on October 10, 2010, 05:43:48 PM
I'm hooked. I wanna hear it. NOW.

+1!!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 10, 2010, 06:12:36 PM
Recorded in a snatched moment (I was using one eye to make sure that a little girl didn't harass a guinea pig!):

http://www.youtube.com/watch?v=6tAS8-J2SX4

Minor "Shambles", leading into major.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: glops on October 10, 2010, 06:39:33 PM
Love it! I have a mutation of the little angel chorus on a bboard right now that I have abusing with a Companion.  Gonna try this one out tonight.  Your circuit is exactly what I have been looking for.  Good work!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Renegadrian on October 10, 2010, 07:03:26 PM
Nice project! Thank you!!!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: frequencycentral on October 10, 2010, 07:09:56 PM
That sounds great for NOISE, very much in Clari territory but a super-low parts count. From the short soundclip it sounded preferable to the Clari to me, more controlled and more closely tracked to what the guitar is doing. Very innovative. Very guerilla.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Evad Nomenclature on October 10, 2010, 07:57:07 PM
Damn.
That's crazypants.
nice.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: frequencycentral on October 10, 2010, 08:31:25 PM
Here's a PCB layout. Unverified. Did it real quick so it will need checking by a pair of sharp eyes. The part numbers follow anchovie's stripboard part numbers. I added D1 for polarity protection and C7 for ripple stability. 1590A anyone?

(http://dl.dropbox.com/u/967492/Noise%20PCB.gif)
(http://dl.dropbox.com/u/967492/Noise%20PnP.gif)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Labaris on October 10, 2010, 11:11:42 PM
 :icon_eek:

Great!! (My favorite word in english I think)

Innovation is what we need, and less mojo things

Congrats!! :)
And it seems you found here a fan of PT2399, he will surely help you a lot to improve the design
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: nbabmf on October 11, 2010, 01:41:36 AM
That is awesome.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: glops on October 11, 2010, 02:13:22 AM
I breadboarded this tonight and I must say that it is AWESOME!  It is so thick and warbling.  I absolutely love it.  Thank you so much for such a great sounding simple circuit.  Perfect.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: linny1982 on October 11, 2010, 03:13:16 AM
got a few pt's layin around. gonna have to give this a go
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 11, 2010, 05:37:07 AM
Thanks for the good reactions, folks! And extra thanks to Rick for jumping straight in with a PCB layout!

I'm really pleased with how this turned out, I had the idea while doing the washing-up after breakfast but wasn't sure exactly how it would sound. I'm very impressed with the distortion produced when the PT2399's opamp rails clip the signal, I reckon an experiment in the near future will involve trying to make it more dynamic rather than having the splatty fade-out that a comparator gives. Though for this circuit, splatty is perfect.  ;D


On watching the clip again, I've noticed that the small person in the pink top who walks behind me was carrying my solder sucker. I guess that means it's buried somewhere in the garden now.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 11, 2010, 08:05:29 AM
Too bad solder suckers are usually plastic, or you could DIY a metal detector to help you find it.   8)

Very cool abuse of the PT2399.  One way to tame the comparator while keeping extreme amounts of fuzz is with some very minimal negative feedback.  For instance like the first op-amp section here, where most of the feedback is shunted to ground through the 1uF/100r path before it gets back to the inverting input.

(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=42453&g2_serialNumber=1)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: ~arph on October 11, 2010, 08:27:58 AM
Wow sounds great!  I'll have to give this a try soon.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: slacker on October 11, 2010, 01:35:39 PM
Nice  :icon_twisted:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: RickL on October 11, 2010, 02:28:04 PM
I've spotted a small problem with the pcb layout. C5 is shown connected to pin 15 of the PT2399. It should go to pin 14. Everything else seems okay.

Rick
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: frequencycentral on October 11, 2010, 03:23:04 PM
I've spotted a small problem with the pcb layout. C5 is shown connected to pin 15 of the PT2399. It should go to pin 14. Everything else seems okay.

Rick

Ooops! Thanks! Fixed and re-uploaded!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 12, 2010, 08:09:45 AM
Too bad solder suckers are usually plastic, or you could DIY a metal detector to help you find it.   8)

Panic over! Discovered this morning that she'd shoved it in a kitchen drawer, next to the freezer bags.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: DougH on October 12, 2010, 09:31:50 AM
Recorded in a snatched moment (I was using one eye to make sure that a little girl didn't harass a guinea pig!):

http://www.youtube.com/watch?v=6tAS8-J2SX4

Minor "Shambles", leading into major.

Now that's pretty cool...

Wild stuff, mon... Really wild...

 :icon_cool:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: wavley on October 12, 2010, 09:47:10 AM
I think this is next on my build list after I finish my Phase 45 as a project for school, I was working up what I needed to order so now I need to add some PT2399 to my list.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 12, 2010, 11:05:42 AM
Excellent. I just received a crapload of PT2399s from Tayda for experimenting and this will go straight to the top of the list! Thanks.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: culturejam on October 12, 2010, 12:09:48 PM
Awesome.  :)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Skruffyhound on October 12, 2010, 04:26:30 PM
LOL - when she walks past with the solder pump! Those things are just children magnets.
Nice design. I want to see where this goes, so I'll write this comment and wait for updates :icon_mrgreen:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 16, 2010, 12:22:13 PM
I breadboarded this last night. Lots of dirty, dirty fun!

Messing with the values of the 47K resistor and "shambles" pot can yield interesting results (leaving the  47K out completely "cleans up" the repeats--as much as possible in this circuit--and could be fun to have on a toggle).

I added an LDR in series with the shambles pot for extra nonsensical fun. Not sure if I'll actually box one of these up, as my Clari(not) build fits a similar need, but this is definitely a fun circtuit with very low parts count! Excellent job.

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Earthscum on October 16, 2010, 11:36:39 PM
So, I finally had my board cleared of all circuits and tried this out tonight... it's awesome, except for the massive squealing and basically just nasty feedback I'm getting... anyone else? I love the sounds I can get when I play, but I don't like the sounds I get when I don't.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 17, 2010, 03:25:32 AM
I've had no squealing problems with it, in fact I've found that the comparator input stage gates quite heavily when the signal level is low enough. Make sure you've definitely got the demod cap on pin 7 and not pin 8 - pin 8 with this circuit introduces a lot of noise, likewise there should be no filter cap between 9 and 10. You could maybe try increasing the 10nF cap to take more of the digital hash off.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: metallo on October 17, 2010, 07:22:57 AM
Very nice circuit, thanks for sharing!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Earthscum on October 17, 2010, 11:43:13 AM
Ok... so, noise was apparently caused by the 47k. I yanked it, circuit works beautifully... well, in a manner of speaking   :icon_biggrin:

I tried a 10k, and it didn't have any effect different than the 47k. Guess I know what one to leave out! Anyways, I ran this into a Jfet buffer with some top-end rolloff, and it smoothed out the 'staticy' portion of the initial signal to something more along the lines of a CMOS distortion. Only other thing I may do is up one of the 10k's to decrease the tails just a hair, or a simple pot to adjust the decay of the tails.

I'm really digging on the sound! This one may get added to my noise box project... yeah, it will. I haven't heard anything quite like this... even the Clari doesn't get this far into the "nasty" territory! This thing is so deep in, I'm actually surprised I can still make out notes and chords, but that's the beauty of it. It's usable noise, lol!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 17, 2010, 11:58:55 AM
leaving the  47K out completely "cleans up" the repeats--as much as possible in this circuit--and could be fun to have on a toggle

Ok... so, noise was apparently caused by the 47k. I yanked it, circuit works beautifully... well, in a manner of speaking   :icon_biggrin:

Interesting...I used the 47k after originally connecting the comparator output directly to the delay pin - that gave me a choppy tremolo rather than an echo which is why I added the resistor to limit the level of the modulation signal.

I guess the chip was never designed for a circuit like this, so if there's a variance with this particular (dis)function then at least it's something people are now aware of when building.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 18, 2010, 02:59:11 PM
Last night I replaced the 10K resistor between pins 11 and 12 with a 50k pot and it is very useful for dialing in just the right level of repeats. At 0k it's almost a "wet only" boosted signal and at 50K the repeats are just a ghostly whisper.

I used something like an 82K resistor in place of the 47K and it seems to put it into nice crazy territory, so I'll likely add a toggle to disconnect it completely depending on what sound I want ("clean" or crazy).

Add an LDR or two for wacky fun and I might just have to box this up after all!

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 19, 2010, 10:09:13 AM
Alright, so I've officially got this to a point that I think it's most versatile and usable in many settings. There are now 5 knobs instead of two though(!): volume, delay time (shambles), dry level, wet level, modulation(repeat craziness).

One of the 10k resistors seems to affect level of repeats and another effects level of dry signal. With pots replacing those (in series with resistors to attain optimum sweep) you can now have a huge variety of wet/dry combinations.

Also, I my experience with the 47k resistor is as follows:

- with it in place the repeats are zany
- without it in place the repeats are "clean"-ish (no jumper, just breaking the connection)

That means that a 47k resistor in series with a large value pot (1M in my case) can allow you to control how zany the repeats are (with 1M being enough resistance to simulate a broken connection between the pins). This becomes the "modulation" pot.

I played with the cap values too, but didn't really find anything too exciting, so left them alone.

Thanks for the fun circuit--this is the perfect sort of thing for a breadboard noob like myself to cut my teeth on!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: John Lyons on October 19, 2010, 12:56:59 PM
Paul
Can you draw up a schematic of what you have please?
I'm curious to see what you did.

John
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: glops on October 19, 2010, 02:48:32 PM
Paul
Can you draw up a schematic of what you have please?
I'm curious to see what you did.

John

+1   I would like to see your additions, as well.  This is a GREAT circuit! I'm gonna call mine, the Shambler.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 19, 2010, 09:44:34 PM
Blech...schematics are not my friend. I started drawing one but it was an unreadable schematic/layout hybrid.

I'll perf mine up then make sense of what I did on the breadboard and try to come up with pics/drawings.

Suffice to say that, when looking at the vero layout, I did the following:

- added a 1M pot from R3 to pin 10

- replaced R5 with a 1k resistor in series with a 50K pot to pin 14
 
- replaced R4 with a 250k pot

- replaced R1 with a 5.6K resistor and P1 with a 50K pot

I'll probably also ditch the volume pot (or replace it with a trimpot).

Anway, that's it for now, I'm off to try to perf this thing so I can post a layout!

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 20, 2010, 05:12:42 AM
Great stuff Paul! Glad you've enjoyed playing around with this - I knew when I posted the circuit that it could be expanded upon and I'm pleased to see that it's been experimented with.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: e45tg4t3 on October 20, 2010, 06:14:30 AM
Hi there,
Paul based upon your last posts i drew a schematic, but i donīt know if they are like you had them in mind... So would you please be so kind an look over it?

ftp://epa-art.dyndns.org/Stuff/NE%20Schem.png (ftp://epa-art.dyndns.org/Stuff/NE%20Schem.png)

Ben
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 20, 2010, 09:20:41 AM
Hi there,
Paul based upon your last posts i drew a schematic, but i donīt know if they are like you had them in mind... So would you please be so kind an look over it?

ftp://epa-art.dyndns.org/Stuff/NE%20Schem.png (ftp://epa-art.dyndns.org/Stuff/NE%20Schem.png)

Ben

Whoa, Ben! Thanks for that. Word of warning though, I perfed my breadboarded version late last night (first mistake) and it isn't quite working properly (your schematic could still be correct though, as it might be my perf layout that's screwing up). I'll go over the breadboard and perf again tonight to see what's what.

Confession: this is my first time going from schematic to breadboard to perf, so don't get your hopes up!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: e45tg4t3 on October 21, 2010, 02:11:06 AM
No Problem Paul, there was a first time for all of us.. :icon_biggrin: .. the only thing that cunfused me a little bit in your description was  the connection of R3+1Meg pot to Pin10.. I thought you may mean Pin 14 (Just because R3 is already Connected to pin 14)... So thank you for your kind words...

Ben
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: glops on October 21, 2010, 03:34:02 AM
I perfed and box one up tonight to send to a friend in Italy.  did it stock to the first schematic. hopefully, I will do mine tomorrow. may try some mods but really love this thing stock. 
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 21, 2010, 09:34:31 AM
No Problem Paul, there was a first time for all of us.. :icon_biggrin: .. the only thing that cunfused me a little bit in your description was  the connection of R3+1Meg pot to Pin10.. I thought you may mean Pin 14 (Just because R3 is already Connected to pin 14)... So thank you for your kind words...

Ben

Hey Ben, you are right, I was definitely counting the pins wrong on the right side (top to bottom instead...). Nice catch.

Also, I got my perf working last night with a few tweaks (you'll likely want the 1M pot on the other side of the 47k in Ben's schematic). I changed a few pot/resistor values along the way to get the optimal sweep for the various controls too.

I'll try to post a layout when I've got time to draw one up. It sounds crazy now! Very fun to dial in as much or as little repeat level as you want (as well as "dry" level). The 1M pot could also just as easily be replaced by a toggle that just breaks the connection to the 47K. You'd get a similar result. My advice would be to either breadboard or socket just about everything and adjust to taste.

All told though, this is a really fun pedal--5 knobs that are very sensitive to each other. I also find the fuzz more useful than the Clari(not)--I put a fuzz lift in mine and only use it clean, as it's too noisy otherwise.

The whole thing sounds like a being chased by an angry, farty ghost...in a good way.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 23, 2010, 12:20:02 AM
This is a fun little circuit.  :)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Earthscum on October 23, 2010, 12:32:44 AM
This is a fun little circuit.  :)

+100 to that... I've boarded this and tore it down 3 times now. Just too much fun getting nasty noise to the gigantic auditorium sounds... and the decay is awesome! If I box this up, I'm probably doing a couple of the previously mentioned mods, and a momentary button and max decay knob for it so I can use it to end a song live with that trailing off into silence! :icon_twisted:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: frequencycentral on October 23, 2010, 07:06:14 AM
(http://dl.dropbox.com/u/967492/NE.jpg)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 23, 2010, 01:53:11 PM
One thing I found useful was to add an LED in series with the 47k* that injects the audio into pin 6.  Cathode to pin 6, this makes it so when the delay time is shorter, the LED resistance is lower, so the amount of modulation stays fairly constant throughout the delay range.

*You might need to tweak the value of this resistor depending on the output of pin 15 as well as the forward voltage of the LED.  I used some resistors to lower the gain of the input op-amp so I reduced that resistor value to something like 1k.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: clamup1 on October 23, 2010, 03:48:05 PM
this thing is funnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn. i have a fuzz, chorus, little echo from hell.  if it could be cleaned up it would be awsome. ill have to try the mods listed and see what happens. great circuit
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 25, 2010, 12:17:06 PM
My tweaks:

(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=43881&g2_serialNumber=4)

100k is complete overkill for the delay time pot.  I really only use the first 10k of it.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 25, 2010, 03:24:13 PM
My tweaks:
100k is complete overkill for the delay time pot.  I really only use the first 10k of it.

Nice! What effect do the diodes have--are they helping to lessen the fuzz?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 25, 2010, 05:47:54 PM
Nice! What effect do the diodes have--are they helping to lessen the fuzz?

The input stage in Anchovie's schem has no feedback so its gain is very high.  In mine the gain is about 23 which is still fairly high but no longer fuzzy.  The diodes in the output section clip the signal and therefore add distortion, but the distortion from them is more gradual and "softer" than if I leave them out and let the op-amp clip.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on October 26, 2010, 02:49:15 AM
Nice! What effect do the diodes have--are they helping to lessen the fuzz?

The input stage in Anchovie's schem has no feedback so its gain is very high.  In mine the gain is about 23 which is still fairly high but no longer fuzzy.  The diodes in the output section clip the signal and therefore add distortion, but the distortion from them is more gradual and "softer" than if I leave them out and let the op-amp clip.

Oh, cool. Thanks for the breakdown! I'll have to see which I prefer more, as I'm enjoying the stock clipping so far. This circuit definitely has infinite posibilities!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on October 26, 2010, 03:04:37 AM
Alex, did you find that the filter caps that I left out became essential as soon as you stopped using the first opamp as a comparator? I was surprised that they added hiss and crackle in my original circuit.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 26, 2010, 08:55:22 AM
Alex, did you find that the filter caps that I left out became essential as soon as you stopped using the first opamp as a comparator? I was surprised that they added hiss and crackle in my original circuit.

I think I tried it first without one of those caps, but got better results with them in.  In particular I couldn't get anything useful (i.e. no audio) without the caps from pins 7 and 8 going to ground (or was it just the pin 8 cap...? I don't remember).  I did not try any substitute values in those spots, for what it's worth.  For the 9/10 and 11/12 caps I tried some different values but found 10n to be a good compromise between noise and bandwidth.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Pigyboy on October 26, 2010, 09:18:48 AM
Can you say 1590A? ;D
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Perrow on October 26, 2010, 04:52:47 PM
I just love these low part count circuits.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: duckpow on October 27, 2010, 03:52:09 AM
I've put this together in a box yesterday :D It's an awful lot of fun. Did almost no change to the original design. Tried adding a feedback system... but it got way too fast way too wacky... and I love wacky  ??? :o
Did add a cap to ground from input, to filter out some top end... It had a nasty crackle above 10khz
Will post pic when I have found my camera.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: earthtonesaudio on October 27, 2010, 10:10:33 AM
I increased the gain and added some feedback:

(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=43908&g2_serialNumber=2)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on November 11, 2010, 02:43:24 PM
Thinking about finally boxing mine up this week (have the perfect Curious George tin for it). There's room for another small circuit in there though. What do you think would be a fitting compliment to this craziness?

Options I've got kicking around include:

compressors
tremolo (tremulus lune might have too many knobs, but the tiny tremolo would work)
fuzz (never a shortage of these...)
what (got a nurse quaky sitting unboxed)

Or other?

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: DDD on November 11, 2010, 04:28:50 PM
AMZ Mosfet Booster.
Be a gentleman.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: faptdivers on November 11, 2010, 05:38:08 PM
MXR Blue Box , be a rapist.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: DDD on November 16, 2010, 01:25:23 PM
Ampeg Scrambler  ;D
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on November 16, 2010, 03:42:31 PM
Thing Modulator.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: emstin1 on November 17, 2010, 10:45:32 PM
Stuff a random number generator in there, it might sound like a 56k modem on acid.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on November 18, 2010, 01:13:31 PM
Please anybody repost   :icon_twisted: the layout and PCB for etching this extraordinary little monster!!!!!!!!!!!!!!!!!!!!!! :icon_rolleyes:  :icon_rolleyes:  :icon_eek:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: newfish on November 18, 2010, 04:15:01 PM
Wow.

Just ordered a pair of PT2399s and can't wait to breadboard this.

Just, how much fun are these 'Ensembles' exactly?

I guess I'll find out next week...

Thanks for raising the 'crazy DIY circuits' bar!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: duckpow on November 18, 2010, 04:19:49 PM
Just, how much fun are these 'Ensembles' exactly?

Be prepared: They are crazy fun. The sound by it self (without delay) is really balls out nasty fuzz. Add the delay and it's just huge  ;D

Good luck building. u won't regret any minute u spent on it!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on November 18, 2010, 05:23:32 PM
Itīs so simple I donīt wait to made mine too!!!! what a sound out there!!!!!!!!!!!!   :icon_rolleyes:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: frequencycentral on November 18, 2010, 05:26:51 PM
Please anybody repost   :icon_twisted: the layout and PCB for etching this extraordinary little monster!!!!!!!!!!!!!!!!!!!!!! :icon_rolleyes:  :icon_rolleyes:  :icon_eek:

http://www.diystompboxes.com/smfforum/index.php?topic=87493.msg735869#msg735869
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on November 18, 2010, 08:39:48 PM
Oh yea I sw then!!!! thanks!!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: tombola on January 04, 2011, 06:59:37 PM
Thanks for this great circuit, James. I just boxed one up over Christmas: http://www.diystompboxes.com/smfforum/index.php?topic=36392.msg753681#msg753681

Also another sound demo here: http://soundcloud.com/musicthing/noise-ensemble-delay-fuzz-pedal-demo
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: ~arph on January 06, 2011, 10:03:07 AM
This is such a cool little circuit, it deserves to be on page one  ;D
(I wanted to hear it again today)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: glops on January 18, 2011, 03:20:26 PM
I finally boxed mine up and called it the Shambler.  I have an extra footswitch to switch between the stock Ensemble and a mod I did that jumps one of the pins into the 2.2 cap before the output and is wired to its own volume pot.  Not sure what this does but it makes the effect more wobbly.  Maybe it's just pure wet modulated sound? I liked it when I had it breadboarded and decided to throw it in.  Definitely an acquired taste. 

Anyway, that's anchovie for this great circuit!

Here's a couple of vids....

http://www.youtube.com/watch?v=RML51Vlla-I

http://www.youtube.com/watch?v=7sfR6rujvz4
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: tombola on January 18, 2011, 03:43:41 PM
Great looking pedal!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: glops on January 18, 2011, 06:40:48 PM
Great looking pedal!

Thanks, man!  Yours is pretty nice, as well.  I played around with a feedback loop but got too impatient ended up just wanting to get it done.
This is definitely a circuit I will come back to, though.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on January 18, 2011, 11:43:09 PM
I've made a reissued layout cause I'm the crazy man of the pot in PCB; these are the layout:

(http://img225.imageshack.us/img225/1220/noiseensemblemodlayout.gif)

thanks to frecuencycentral and anchovie

And the PCB; it very useful:
(http://img20.imageshack.us/img20/7021/noiseensemblenewpcb.gif)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Taylor on January 18, 2011, 11:46:58 PM
I like that PCB style.  8)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on January 19, 2011, 12:23:27 AM
You love it I'm crazy for it!!!!!!!!!!!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on January 19, 2011, 05:07:29 AM
Its awesome to see people putting their own little mods and bends in this!  :)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on January 19, 2011, 10:49:31 AM
Anchovie you are my inspiration!!! and what hapends of the 5 knobs layout??
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on January 19, 2011, 10:58:24 AM
I'll post my 5-knob layout soon. Some of the knobs are really not that useful though...
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on January 19, 2011, 10:59:49 AM
OK Paul W. I'm waiting for it!!!!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on January 28, 2011, 12:46:21 AM
OK, almost done building. I scaled it back to 4 knobs (volume, delay time, repeat weirdness and repeat level). It's going to take some reverse engineering to figure out what I did, as it's a bit of a mess, but it's going to be an awesome beast:

Noise Ensemble + Little Angel + Nurse Quacky in one cookie tin.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on February 01, 2011, 10:41:32 AM
Alright guys, I finally boxed this bad boy up. I couldn't decide what to put it with, so I went for broke and crammed it into a cookie tin with a Dr. Quack and modded Little Angel.

In the end, I scaled it back to 3 knobs and a toggle (volume, repeat level, delay time and delay weirdness).

The mods are as follows: the toggle breaks the connection to the 47K resistor (I'm still playing with the exact value of the resistor there) and cleans up the repeats. A higher level resistor here would really make them go crazy with the toggle engaged.

I replaced the 10K resistor between pins 11 and 12 with a 50k pot. This controls the level of the repeats (from very quiet to incredibly loud).

Here's a pic (it has four knobs here, because I added the toggle last night and gave the extra space to an intensity control for the Little Angel). Check out the sound sample posted at our band site (http://dogisblue.com/crazy-new-pedal-fuzz-echo-wah-chorus-woo/) too.

(http://dogisblue.com/images/pedals/alphabet_pedal_01.jpg)

(http://dogisblue.com/images/pedals/alphabet_pedal_02.jpg)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: nick d on February 01, 2011, 11:43:06 AM
                   Just heard the clip -  that is seriously WRONG!  I  LOVE IT !!!!!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on February 01, 2011, 01:17:30 PM
Hey paul PLEASE PLEASE PLEASE a layout for thisssss!!!!!!!!!!!!!!!!!!!!!!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on February 01, 2011, 02:58:16 PM
Hey paul PLEASE PLEASE PLEASE a layout for thisssss!!!!!!!!!!!!!!!!!!!!!!

The layout's the same as the one on the first page, just with the two mods I mentioned above (I had 5 knobs at one point, but they were not very usable...overkill).

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: glops on February 03, 2011, 04:25:59 PM
Great clip!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: mirmite on June 18, 2011, 08:07:46 AM
i might be really stupid now but i have been trying for a while to build this, and i get mostly distortion sounds no real looping or fuzz effect, and i was woundering where shuld i solder the sleve aka ground from the input and the output
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: pinkjimiphoton on June 18, 2011, 09:49:48 AM
DUDE, THAT IS SICK, I F***IN LOVE IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :icon_mrgreen:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on June 18, 2011, 12:38:45 PM
i might be really stupid now but i have been trying for a while to build this, and i get mostly distortion sounds no real looping or fuzz effect, and i was woundering where shuld i solder the sleve aka ground from the input and the output

All grounds are connected, so you want the input and output sleeves connecting to power supply ground.

My schematic doesn't provide looping - if you want that you'll have to implement feedback yourself. The delay section of the chip will provide a single echo. You'll have to explain to me what the difference between distortion and fuzz is in your case - are you actually getting a guitar signal through or is it just making noise?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on June 18, 2011, 12:39:08 PM
DUDE, THAT IS SICK, I F***IN LOVE IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :icon_mrgreen:

My pleasure!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: GodSaveMetal on June 18, 2011, 04:14:36 PM
DUDE, THAT IS SICK, I F***IN LOVE IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :icon_mrgreen:

My pleasure!
OK OK and Iīm too for this is great!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :icon_twisted:  :icon_twisted:  :icon_twisted:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: mirmite on June 21, 2011, 09:19:47 AM
i might be really stupid now but i have been trying for a while to build this, and i get mostly distortion sounds no real looping or fuzz effect, and i was woundering where shuld i solder the sleve aka ground from the input and the output

All grounds are connected, so you want the input and output sleeves connecting to power supply ground.

My schematic doesn't provide looping - if you want that you'll have to implement feedback yourself. The delay section of the chip will provide a single echo. You'll have to explain to me what the difference between distortion and fuzz is in your case - are you actually getting a guitar signal through or is it just making noise?

Thanks mate got it upp and running did hafto change some pots that vere aperently broken but it works well now :)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: DarrenCotta on September 21, 2011, 01:53:06 PM
Anyone know where I can the 7805?  :-[ Or is there something I can use instead?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on September 22, 2011, 04:39:04 AM
You could use the 78L05 which is the lower-current version, just make sure you check the pinout on a datasheet.

Where do you live? It's not an obscure part - even Radio Shack stock the 7805!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: DarrenCotta on September 22, 2011, 08:17:22 AM
 ;D lul I'm a newb trying to build my first vero boarded project!

Wiiiiish me luck. I'm sourcing parts at the moment. Hopefully I don't lose my sanity!   :-\
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: boog on October 13, 2011, 10:03:53 PM
finally built this; freakin awesome \m/  but it acts a bit different now that it's boxed up.

i did two mods that paul had done: a 100k pot for the shambles control, and a 500k pot between the 47k resistor and pin 6. nice. so, when i had this thing wired up to my test rig, there seemed to be an indeterminable number of repeats. now there's just one. the only other difference is that my test rig is millennium bypass and it's now got ol' blue for a footswitch (3pdt). i know that my millennium has something amiss (high gain circuits really oscillate a bunch on that guy) but could this possibly be the culprit? or am i just remembering things that didn't happen?

anyway, kudos to this thing!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: boog on October 13, 2011, 11:00:45 PM
how about this: because of the way the millennium is wired on the dpdt, is it possible that those little electron thingies are 'jumping' from the output back to the input? i say this because the repeats continued to get weirder as they went on, eventually dying out. so it's not like it would need a lot of signal, and my dpdt's are rather cheap. i got this idea from doing this: ran the noise ensemble through a feedback looper (great idea, if i do say so myself  :icon_twisted:) and was, of course, able to get my infinite repeat, but they stayed at the same volume without decay. so it would have to be some kind of decaying signal returning to the input?

now to find my thing modulator and stick that in the loop as well.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: mongo on April 01, 2012, 12:30:08 PM

 I know this is old but...

I built this and I get a nice fuzz that is affected by the DIN pot. The shambles pot seems dead? I double checked traces, values orientation, no dice. Any ideas on what could be wrong?

 Thanks in advance

 Andy


Here's a PCB layout. Unverified. Did it real quick so it will need checking by a pair of sharp eyes. The part numbers follow anchovie's stripboard part numbers. I added D1 for polarity protection and C7 for ripple stability. 1590A anyone?

(http://dl.dropbox.com/u/967492/Noise%20PCB.gif)
(http://dl.dropbox.com/u/967492/Noise%20PnP.gif)

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on April 05, 2012, 02:17:53 PM
Hey guys,

Just a heads up, as I've received a few PMs asking abut this, but keep in mind that when I posted any mod ideas a few pages back that I can't seem to count IC pins right! Anything on the right side of the PT2399 was counted backwards, so when I'm talking about pins 11 & 12 I actually mean  13 & 14, etc.

Apologies for any confusion and happy modding!

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: blacken on April 07, 2012, 02:08:22 AM
This seems really cool I been looking for a nice little delay to integrate into a little synth and this might be pretty good.  thanks!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: timd on September 07, 2012, 08:18:07 PM
Layout (currently unverified):
(http://i51.tinypic.com/14scry1.gif)

Has this layout been verified? This thing sounds great.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: kinski on January 06, 2013, 01:05:32 PM
So I built this bad boy. Pretty fun! Pretty noisy!

It there a way to put a pot (or at least replace a resistor) to control the amount of repeats. When the delay length is set higher, the number of repeats gets a bit out of hand. I'd love to be able to reign it in a bit.

Great build! Thanks!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: kinski on January 06, 2013, 08:06:51 PM
Nothing?  :icon_lol:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: timd on January 06, 2013, 08:27:37 PM
Nothing?  :icon_lol:
Hey, don't feel bad - I posted in October and had nothing but tumbleweed roll by... Typically with any circuit that has the pt2399 chip, the echo control comes off of pin 6. In this case pin 6 is connected to P1 via R1. Breadboard this circuit and alter the size of both R1 and P1. The key is to experiment. When you get tired of that, experiment some more.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: kinski on January 06, 2013, 08:31:29 PM
Cool, thanks! I'll try this out. I did not have a 22k pot, so I used a 50k.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: timd on January 07, 2013, 08:50:23 PM
Also, if you haven't already, give this whole thread a read. There's a lot of mods and good info in there.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: drummer4gc on August 24, 2013, 12:54:59 PM
Hope y'all don't mind me raising the dead a little bit...

I've got a question about PT2399s in general that came to me when breadboarding this circuit. I've got one PT that gives an awesome, nasty, velco gated fuzz in this circuit, and I've got another one with much more sustain - so much, in fact, that it hums/oscillates when notes aren't being played and the guitar's volume control is on 10.

I really am just beginning to learn about op amp configurations and their utilization in our circuits, and I know that there seem to be pretty big differences from one pt2399 to another. I'm wondering if, in the particular case I described, there is a single characteristic of the PT that varies from chip to chip, and if that's the case, if there is a way to sort of tune them into this circuit, like how we bias transistors with trimpots.

Again, my knowledge is super elementary in this area, and I'm reading all that I can. Just thought I'd ask to help me understand and to maybe add some more consistency to this particular project (even though it IS a warbly-fuzzy-echoy-acidnightmare pedal!)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on August 27, 2013, 06:53:51 AM
Attempting to resurrect the associated breadboard memories of this!  ;)

Try different values in place of the 100k resistor between pins 16 & 2 that connects the comparator input to the 2.5V reference - I can't give any hints as to higher or lower! I just have a hazy memory of trying different values before settling on the 100k for the chips that I had. Might need to change the input cap too, but I'd start with that resistor.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on September 07, 2013, 05:43:08 PM
Hello noise freaks

I've spent the day playing around with this great circuit (and scaring my neighbours).
I'm workiing with Anchovie's orig scheme and have made the folloowing mods:
-added a 2.2M resist before the out pot to quiet it down
-replaced the 47k resist between pins 6 and 15 to create more chaos
-replaced the 10k resist between pins 13 and 15 to adjust the initial signal and the repeat mix
I'd like to add a fuzz level control. Any suggestions on how to do this? I'm looking for a typical fuzz box control not diode clipping 
Thanks
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on September 08, 2013, 11:49:59 AM
https://dl-web.dropbox.com/get/IMG-20130908-00316.jpg?w=AAC1WJmqIKMYXTap__qG_vjOYrKRRSLCBOjGfumocbKqnA (https://dl-web.dropbox.com/get/IMG-20130908-00316.jpg?w=AAC1WJmqIKMYXTap__qG_vjOYrKRRSLCBOjGfumocbKqnA)http://

Slight change of plans....
I now have a six pot noise ensemble on my breadboard. I can't figure out how to get good repeat control. The pot marked feedback provides feedback but not the repreats I was hoping for. Any suggestions?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on September 08, 2013, 02:43:52 PM
I can't see your schem as I haven't got a Dropbox account so I don't know what other mods you've done, but with a "stock" Noise Ensemble you won't be able to just add a repeats pot like you would with a regular delay because of that first opamp stage being a comparator. Whatever goes in gets slammed to the full output swing of the opamp with no inbetween, so you'd have to completely redesign that first stage if you're looking for decaying repeats.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on September 08, 2013, 05:24:05 PM
http://www.aronnelson.com/gallery/main.php/v/peterg/IMG-20130908-00316.jpg.html (http://www.aronnelson.com/gallery/main.php/v/peterg/IMG-20130908-00316.jpg.html)

Thanks James

Please try the attached like for the scheme. Any ideas wiring a fuzz control pot? I'm determined to make this a 6 pot pedal!

Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on September 10, 2013, 06:21:20 AM
You could experiment with making the first opamp a variable gain stage - remove the resistor between pins 2 & 16 and make the input 1uF -> 10k -> pin 16. Put a 10K resistor and a pot in series between pins 15 & 16. I think I messed around with this idea before and found that if the pot value is too high the PT2399 would malfunction as that first opamp isn't totally isolated from the A/D converter that it feeds inside the chip. YYMV though, give the variety of quirks in the PT2399 that forum members have seen. Start with a 1meg pot and see if it functions over the full range.

Input impedance will be really low, so if this is a problem then just have the 10k resistor between 15 & 16 and put the high-impedance variable-gain booster of your choice before the Noise Ensemble to overdrive the PT2399 input.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on September 12, 2013, 08:46:04 AM
Thanks James

I don't want to mess with your circuit and Alex's (from earthtonesaaudio) mods  to it (scheme below) too much.

http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=43908&g2_serialNumber=2 (http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=43908&g2_serialNumber=2)

Alex mentions the additions made to the circuit at pins 14, 15 and 16 are for "less fuzz, nonlinear envelope control and regeneration".

Can anyone tell me what altering the 22k resistor/.1uf cap between pins 15/16 and 14 changes and what altering the 1M resistor at pin 16 changes? I'm subbing with pots and figuring out pot names.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on September 12, 2013, 09:35:55 AM
I think changing the 1meg resistor to a pot would give you a gain control, and changing the 22k to a pot would affect repeats. I'm partly guessing, though.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on September 13, 2013, 07:44:22 AM
Thanks James. Adjusting the 1M resistor does affect the gain and deleting it makes the modulation go crazy as per your orig scheme. Adjusting the 22K resistor causes feedback at certain levels.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on September 15, 2013, 05:28:25 PM
(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=49614&g2_serialNumber=2)

Working on the envelope control and can't figure out how to make it work. I can't find a large enough resistance pot for it. Can I work with a smaller pot and achieve 0 to about 50M resistance. If not how can I wire a switch to have say 1M resist in mid position (on, off, on switch), 50M resistance (or disconnect) in #1 position and 100k in #3 position?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on September 16, 2013, 06:52:49 AM
If you want that precise ordering for the switch, you'll need a 3-position rotary or slider. For an on/off/on toggle, the "disconnect" option will have to be position #2.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on November 02, 2013, 01:02:43 PM
(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=49968&g2_serialNumber=1)(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=49965&g2_serialNumber=1)(http://www.aronnelson.com/gallery/main.php/v/peterg/noise_20bomb_20scheme.jpg.html)

My take on Anchovie's great Noise Ensemble circuit.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Bear on November 16, 2013, 05:31:36 PM
I replaced the 10K resistor between pins 13 and 14 [corrected as on page 6] with a 50k pot. This controls the level of the repeats (from very quiet to incredibly loud).

Audio or linear taper for this pot?

Thanks!
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: p_wats on November 25, 2013, 11:08:16 AM
I replaced the 10K resistor between pins 13 and 14 [corrected as on page 6] with a 50k pot. This controls the level of the repeats (from very quiet to incredibly loud).

Audio or linear taper for this pot?

Thanks!

Either would work. I probably used a 50K because that's what I had on hand and it worked fine.

That said, my pedal mysteriously died recently---it was in a giant cookie tin with a few other circuits, so I wasn't aiming for longevity. I haven't tried too hard to bring it back to life since...
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: thefunisover on December 05, 2013, 05:51:29 PM
Hi all,
I've breadboarded peterg's version of the noise ensemble but am having some issues.
When testing with a triangle wave generator, the signal passes through just fine when the circuit is off, but when it is turned on I get no sound. If I connect the
When testing with an oscilloscope, the waves are present when the circuit is on and can be manipulated by the volume and gain knobs.
If I connect the output wire directly to pin 16 of the chip, I get a quiet signal that doesn't sound affected by the circuit.

Help??
Peterg, any pictures of your actual wiring?

Thanks URL=http://s152.photobucket.com/user/thefunisover/media/photo-1.jpg.html](http://i152.photobucket.com/albums/s166/thefunisover/photo-1.jpg)[/URL]
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Canucker on March 12, 2014, 12:31:45 AM
etched my board last night and was rocking out on this today. Can't believe how fast I put this together....I must be getting better at this.There are a ton of posts to read through on this...is there a cure for the sputter among them? Othere then that this is my kinda noise!  :icon_biggrin:
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on March 12, 2014, 06:33:33 AM
Sputter will be from me using the first opamp as a comparator, so incoming signals become either "maximum" or "off". Look at reply #49 from earthtonesaudio - he turned the first opamp into a regular fixed gain stage and made the whole thing fuzzy at the end with a couple of diodes.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on March 12, 2014, 11:55:29 AM
Hi all,
I've breadboarded peterg's version of the noise ensemble but am having some issues.
When testing with a triangle wave generator, the signal passes through just fine when the circuit is off, but when it is turned on I get no sound. If I connect the
When testing with an oscilloscope, the waves are present when the circuit is on and can be manipulated by the volume and gain knobs.
If I connect the output wire directly to pin 16 of the chip, I get a quiet signal that doesn't sound affected by the circuit.

Help??
Peterg, any pictures of your actual wiring?

Thanks URL=http://s152.photobucket.com/user/thefunisover/media/photo-1.jpg.html](http://i152.photobucket.com/albums/s166/thefunisover/photo-1.jpg)[/URL]

Sorry for the really late response. I just noticed the post. Here is a link to the gut shot:

http://www.diystompboxes.com/smfforum/index.php?topic=36392.msg943066#msg943066 (http://www.diystompboxes.com/smfforum/index.php?topic=36392.msg943066#msg943066)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Canucker on March 12, 2014, 04:27:10 PM
Sputter will be from me using the first opamp as a comparator, so incoming signals become either "maximum" or "off". Look at reply #49 from earthtonesaudio - he turned the first opamp into a regular fixed gain stage and made the whole thing fuzzy at the end with a couple of diodes.

Thanks for pointing me in the right direction. It looks like a schematic I can fake my way through figuring out...they are by far my weak point in this game...its why I never breadboard anything I just go right to etching boards.....

I put a switch for the 47k resistor....with it removed from the circuit (mine anyways) I hear no change on any setting....should the switch position that removes the resistor just leave that portion disconnected or should it be connected with no resistance? I left it disconnected.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on March 13, 2014, 07:47:51 AM
Disconnecting the 47K from pin 6 should turn it into a fuzzy slap-back echo with delay time varied by the pot. The other end of the 47K can stay where it is, so you only need a SPST switch.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Canucker on March 14, 2014, 12:32:06 AM
Disconnecting the 47K from pin 6 should turn it into a fuzzy slap-back echo with delay time varied by the pot. The other end of the 47K can stay where it is, so you only need a SPST switch.

I disconnected the 47k resistor from pin 15 and added the spst between them. If I disconnect at pin six does that mean that R1 (1k resistor) is also to be disconnected from pin 6?


I connected this little monster to my Atari Punk Console today....not the earth shattering effect results I thought it might have but it was still pretty fun with high tones. Much more chaotic with guitar.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on March 14, 2014, 08:58:14 AM
I disconnected the 47k resistor from pin 15 and added the spst between them. If I disconnect at pin six does that mean that R1 (1k resistor) is also to be disconnected from pin 6?

No, the 1K + pot on pin 6 is needed otherwise nothing is setting the delay time. The 47K sends the squared input signal into the delay time pin to mess it up somewhat. If you're disconnecting at pin 15 that's the same consequence, as you're breaking that connection that sends the audio into pin 6.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: beedoola on April 10, 2015, 11:52:07 PM
(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=49968&g2_serialNumber=1)(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=49965&g2_serialNumber=1)(http://www.aronnelson.com/gallery/main.php/v/peterg/noise_20bomb_20scheme.jpg.html)

My take on Anchovie's great Noise Ensemble circuit.

Do you have a computer drawn schematic of this or a layout? Much thanks, I'm just having trouble reading it.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: peterg on April 11, 2015, 06:36:34 AM
Sorry I don't. Let me know what you need clarified.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: novusabeo on January 03, 2016, 02:57:18 AM

Old topic == hope someones still out there

Really cool circuit. Hooked her up through my arduino and found out a few interesting things.

If you connect a loose lead (just one end connected) (assuming you've breadboarded) or solder a loose lead from pin 6 of the IC running the original noise bomb (maybe the new one too) schematic and touch the other end -- you have a touch controlled surface that creates a pretty cool soft distortion. Sounds really cool. It also seems to activate the modulation if you tap it - creating kind of an interactive surface.

I'm not all that experienced in the ways of electronics but has anyone else tried this?
and/or
maybe found a way to create a switching system to turn it on and off within the schematic and not just as a touchable surface?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: novusabeo on January 03, 2016, 03:15:38 AM
Based on the original noise ensemble circuit I meant to say******

Not the noise bomb (maybe both - haven't built the noise bomb yet!)
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: BluffChill on October 26, 2016, 03:06:53 PM
I've just built one of these and made a few mods, and it's pretty sweet! About to sketch out a Vero layout. One thing I would like to do is make the gate for the input a bit less sensitive - at the moment I have to play guitar incredibly hard to get any sound out of it. How would I do this?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: anchovie on November 22, 2016, 02:02:29 AM
I've just built one of these and made a few mods, and it's pretty sweet! About to sketch out a Vero layout. One thing I would like to do is make the gate for the input a bit less sensitive - at the moment I have to play guitar incredibly hard to get any sound out of it. How would I do this?

Stick a booster in front of it - nearly all my guitars have really high output pickups so I never had trouble getting the comparator input stage to trigger, but if yours need a bit of help then putting a LPB or similar in front is only a few extra parts.
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: Nice-T on January 21, 2018, 03:11:45 PM
Sorry for raising the dead topic.

I built my noise ensemble long time ago but i have found myself playing with it a lot lately, still like it. But i was thinking it would be nice to add some kind of blend pot to mix the effect and dry signal. I tried some stuff but it didn't work as planned. anyone have any suggestions?
Title: Re: "Noise Ensemble" - simple PT2399 abuse!
Post by: BetterOffShred on March 22, 2019, 04:10:46 PM
So oldie but a goodie here ..

The guy from Dirge (great dude, great pedals) makes a 2399 distortion delay called "slowly melting" and looking at it and going back through this thread I was thinking it's probably based on this.  Anyone checked one out yet?

He even has a "shambles" control