Author Topic: Weird Sound  (Read 8701 times)

12milluz

Weird Sound
« on: August 22, 2007, 07:19:07 PM »
My effect boosts, but thats not all
Here is an uploaded file of the sound it makes.
Really weird, almost a wah. What did I do wrong?

http://uploadhut.com/view.php/595566.wav


Also, which i did not record, if the knob is about 2/3 to full, it boots clearly, until the sound begins to fade out, where it adds the wah effect. Also, if nothin is played while the pedal is on, there is a like beat noise. like a steady beat.
Quote from: Processaurus
You need a glade plug-in, in on a footswitch.  Kick on the big muff, then hit the air freshener pedal.

Visit my site: http://www.freewebs.com/12milluzmusic

aron

Re: Weird Sound
« Reply #1 on: August 23, 2007, 04:03:02 PM »
I can't get that sample to play. Also, someone reported that Norton thinks that site is bad.

12milluz

Re: Weird Sound
« Reply #2 on: August 23, 2007, 05:04:49 PM »
Oh I'm sorry. Ill reupload it.
Quote from: Processaurus
You need a glade plug-in, in on a footswitch.  Kick on the big muff, then hit the air freshener pedal.

Visit my site: http://www.freewebs.com/12milluzmusic

12milluz

Re: Weird Sound
« Reply #3 on: August 23, 2007, 06:42:31 PM »
Quote from: Processaurus
You need a glade plug-in, in on a footswitch.  Kick on the big muff, then hit the air freshener pedal.

Visit my site: http://www.freewebs.com/12milluzmusic

micro

Re: Weird Sound
« Reply #4 on: August 23, 2007, 06:50:51 PM »
Sounds kinda cool at medium! Like "How Soon Is Now" by Morissey. Anyway, hope you get it fixed, if not it's definitely not useless.

12milluz

Re: Weird Sound
« Reply #5 on: August 23, 2007, 07:17:18 PM »
Sounds kinda cool at medium! Like "How Soon Is Now" by Morissey. Anyway, hope you get it fixed, if not it's definitely not useless.
Yeah, I was thinking of actually keeping it like this. Does sound pretty sweet!
Quote from: Processaurus
You need a glade plug-in, in on a footswitch.  Kick on the big muff, then hit the air freshener pedal.

Visit my site: http://www.freewebs.com/12milluzmusic

AceLuby

Re: Weird Sound
« Reply #6 on: March 18, 2008, 01:22:42 PM »
I used mine yesterday and had the same problem.  Did you ever figure out what it is?  I'm gonna switch out the transistor that I put in there the day before (at low volume) to see if it corrects the issue.

12milluz

Re: Weird Sound
« Reply #7 on: March 18, 2008, 06:16:25 PM »
Well I have really tinkered with it since, and I fixed many things, including backwards capacitors and rewiring the pot. Now it works fine, but I'm sorry, I never found the exact cause. Just go over it again with the schematic I suppose and make sure all values and orientations are correct.
Quote from: Processaurus
You need a glade plug-in, in on a footswitch.  Kick on the big muff, then hit the air freshener pedal.

Visit my site: http://www.freewebs.com/12milluzmusic

AceLuby

Re: Weird Sound
« Reply #8 on: March 18, 2008, 08:56:37 PM »
Ok, so I wasn't able to play a whole lot last night and today I tried it and no weird noise.?.?..  So I plugged in my TS and DS-1 in before it and the oscillating started up again, but only when engaged.  Also, it pops when in this configuration when I turn the effect on and off, but this doesn't happen when in the chain by itself, or if the boost is before the chain.  Is there any reason for this?  Both pedals, if put before it, have an amplified oscillating sound similar to this, whether the other pedals are engaged or not.  It only happens when the boost is engaged.  If not, nothing happens.

Possibly even more useful... but still wonder why it's happening.

AceLuby

Re: Weird Sound
« Reply #9 on: April 02, 2008, 12:39:01 PM »
Ok, so tested a little more and it seems like something weird is happening.  If I engage the pedal and my guitar is turned all the way up, everything is fine.  As soon as I turn the volume on my guitar down the warbly sound comes back.  This is with only the boost in the chain.  I'm thinking this has to do w/ why it happens at the end of my chain as well.  Is there any way that the sound produced is because of different levels of input and it can happen because the other pedals suck it out, or because you roll off the guitar volume?

earthtonesaudio

Re: Weird Sound
« Reply #10 on: April 02, 2008, 03:23:44 PM »
The thing you have changed each time is the impedance going into the pedal.  Lowering your guitar volume and putting a buffered effect in the chain both change the impedance of the signal.  Sounds like a bias problem to me.


It reminds me of something a friend once said: "the amplifiers are oscillating and the oscillators aren't."

AceLuby

Re: Weird Sound
« Reply #11 on: April 03, 2008, 11:30:29 AM »
Any suggestions on where to go to next?  I'm not very familiar w/ biasing and couldn't find anything about anyone biasing the beginner project

Gus

Re: Weird Sound
« Reply #12 on: April 03, 2008, 11:59:58 AM »
The bias is DESIGNED in it should not need to be adjusted.

Are you using a power supply bypass cap? 

Try a different battery.

AceLuby

Re: Weird Sound
« Reply #13 on: April 03, 2008, 12:57:02 PM »
The bias is DESIGNED in it should not need to be adjusted.

Are you using a power supply bypass cap? 

Try a different battery.

That's what I thought...

I'm not using a power supply bypass cap.  I've built this exactly to spec except that I'm using a DPDT switch & no LED, a 10k log pot for the boost, and radio shack input jacks.

I've swapped out the battery to no avail and both batteries read over 8V, so I don't think it's that.

The boost overall works, and works great.  I just need to keep it at the front of my chain and I have to keep the guitar volume on full, otherwise the sound oscilates a lot if engaged, but bypasses fine.  I would really like to figure out the reason why this is.  Maybe I could raise the value of the resistor going from power to the collector of the transistor, or put a trim pot in series w/ the 10k resistor?