Doubling effect????

[screamersusa]

Has anyone come with a diy doubling effect?
Basically very short delay and slight detune used to create a live overdub?
Is there a cheap pedal that does only this?
Could a chorus or flanger be modded to do this?

Right now I'm using 1/2 of a virtualizer to get this effect on my heavier guitar parts.
The other half is a chorus on my clean channel.
When engaged my sound gets much heavier more like the double tracked
guitar parts you hear on records (ooops... my age is showing), I mean Cd's...aah Mp3's...
  ok. ok. I meant to say virtual telapathy alpha wave musical brain transfers.  

[doc_drop]

Do a search for the clari(not) and clari-cubed circuits. They create a single delay from a PT2399 chip that gets modulated by an lfo or playing dynamics, depending on which circuit. They can produce a wide range of effects. But, the Clari(not) is also a fuzz, so you will have to do some research on how to eliminate that if you want a clean circuit.
That should get the ole grammaphone swinging!

[frequencycentral]

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I thought the exact same thing as doc_drop, I use my Clari(not) Cubed with a really short delay time and a touch of LFO mod for subtle thickening. The Clari(not) Cubed does have a 'fuzz lift' mod, so you can use it as a clean modulation pedal. All the info is in this thread: http://www.diystompboxes.com/smfforum/index.php?topic=74294.0

[Mark Hammer]

You CAN adapt a chorus pedal to do this, but would need to do the following:

1) Increase the value of the clock range cap by maybe 3-4x (so if it was 120pf, change it to 470pf).

2) With the clock rate slowed down considerably, you will need to adjust the lowpass filtering to a lower corner frequency to keep the clock whine out of the audio.

3) The amount of tolerable modulation is a function of the delay range.  With 3-4x the delay time, you will want to drop the maximum depth (sweep width) by a similar amount.  This will generally involve a fixed resistor in series with the input of the depth pot.

4) Small amounts of modulation are very hard to detect at slow rates of modulation.  Consequentkly, very little of the speed range will be of use to you.  You may want to reduce the speed-range cap in the LFO so that you forfeit the slowest speeds.