Enveloped phase?

[Kipper4]

I'm thinking aloud.





What if I use the Dod fx 25 input buffer and envelope detector. lose R9 and put a decay pot on the end of the envelope.
Make an led driver to control a vactrol. the ldr would be used to control the voltage dividers for speed or depth. (see Causality 4   (speed 470k, Depth 47k lin-47k to gnd)
Take the lfo, phase stages from Rick Holts Causality 4

http://www.diystompboxes.com/smfforum/index.php?topic=80456.0

Result an ota enveloped phaser.

[Mark Hammer]

I tapped the input buffer of a Phase 90, fed it to a Dr. Q type envelope follower to drive an LED, and ran the corresponding LDR in parallel with the Speed pot (which is 500k).  Works great.  I have to say (and have likely said before too many times) that the time constants of envelope-controlled speed have to be judiciously selected.  You don't want things responding too quickly or else the effect is jarring.  Changes canbe much faster for envelope-controlled resonance, but when it comes to speed, you're really making a ramp-up/ramp-down rather than a "sweep".

[ElectricDruid]

If you've got an actual envelope in there, why have an LFO at all? Why not control the phase shift stages with the envelope directly?

Ok, it might get a bit synthy, especially with plenty of resonance, but I can't see that as *always* a bad thing, right?!

Ae there many envelope phasers in the world? I don't know of any. But a phaser is just another type of filter,and there are plenty of envelope filters, so I don't see why it shouldn't be good. Perhaps a bit wakka-wakka-funk-esque, but different?

Whatever, keep pushing the envelope, Kipper! (ahem!)

Tom

[EBK]

Ae there many envelope phasers in the world? I don't know of any.

Pigtronix makes one:
https://pigtronix.com/products/envelope-phaser/

[Mark Hammer]

EHX Polyphase is probably the earliest.

[Kipper4]

I've done it before just not with OTA.

http://youtu.be/9gjNVhJy0pQ


Thanks for the feedback and ideas.
Intresting.

[CthulhuPlaysBass]

I'm thinking aloud.





What if I use the Dod fx 25 input buffer and envelope detector. lose R9 and put a decay pot on the end of the envelope.
Make an led driver to control a vactrol. the ldr would be used to control the voltage dividers for speed or depth. (see Causality 4   (speed 470k, Depth 47k lin-47k to gnd)
Take the lfo, phase stages from Rick Holts Causality 4

http://www.diystompboxes.com/smfforum/index.php?topic=80456.0

Result an ota enveloped phaser.

I don't know what you're saying but I bet it would sound awesome!

[digi2t]

I have a Strymon Ola, and the enveloped chorus is cool. The Son of Stormtide has enveloped flange setting, so why not enveloped phase?

[robthequiet]

Craig Anderton EPFM project 25 is about building an outboard envelope pedal -- idea has been around. I seem to recall the MXR flanger as having a manual setting to respond to pick attack. I would be cool to blend both LFO and EG for depth/speed.

I used to send a Mutron III into a Phase 90 with the resonance maxed on the Mutron. Spooky.

[Mark Hammer]

I have a Boss RPH-10; one of the half-rack units that is essentially a hot-rodded PH-2 pedal.  With some difficulty, I added envelope control, making use of the external control-voltage bus.  It basically duplicates the "Manual"/Initial control function, such that as the sweep occurs, picking strength moves the sweep range upwards.  Sounds nice.  Expressive in a different way than enveloped sweep rate.

[RickL]

Two things:

I've built the Anderton phaser with envelope control and it sweeps the phaser with the envelope, so, one sweep per pick. It's kind of like a normal envelope controlled filter (as Craig likes to describe them) except you are sweeping a notch or notches instead of a peak. I think a number of digital multi effects will do the same thing if you want to hear what it sound like.

I'm pretty sure the manual control on the Boss (and other) flangers is actually a delay time control. Turn the speed and depth controls down and you effectively have a delay pedal with very short delay times.

The first pedal I ever bought new was a  Boss BF-2. I wanted a chorus and the guy in the shop (I've since become quite good friends with him) told me a flanger would give me chorus sounds and a whole bunch more. It took me years before I realized that he was right. Turn down the manual control all the way up, for delay just into the chorus range, turn the resonance control off and use the depth and speed controls to get the chorus sounds you want. Not exactly chorus, but pretty close. I later modified the pedal, based on a Mark Hammer tip, to get delay ranges more in the actual chorus range. And yes, I still have the pedal.