DH Pitch Shifter from GGG

[Govmnt_Lacky]

After investing a lot of time and money into this circuit, I am putting this on here. Does anyone else have any experience/problems with this circuit? I have been in touch with JD regarding my issues but he has his box torn apart at the moment. Just looking for any insight as to what is going on with it.
The volume out is EXTREMELY low! also, the Robot momentary stomp switch does not work AT ALL! I have put about 40 hours of debug (literally) into this circuit and found nothing wrong electrically. Swapped 3 different ICs, several momentary switches for robot and vibrato (which works intermittently).

Here is the project:

http://www.generalguitargadgets.com/projects/20-modulationecho/124-dh-pitch-shifter

Anyone who had built this and got it to work or has any new ideas on where to go next.... your input would be appreciated 

[Morocotopo]

Soory to say, but this is a, hmmm, not very good FX.

I made it, never could get something that I considered useful from it. The chip is 8 bit, so lo fi quality, the robot thingy doesn´t really do anything very useful or distinct. Might be of use if you want a "noise" kind of thing. But clean pitch shifting, forget it.

[anchovie]

Hopefully by the weekend I should have a far simpler project for the HT8950 posted (just need to draw up a schematic). It uses a similar idea to my Noise Ensemble (use the input opamp on the chip as a comparator to bombard it with square-wave fuzz) and similarly has a much lower parts count owing to having no desire for the signal to be clean. There's a single momentary switch to cycle through the different modes.

Any circuit based around an IC designed for a toy megaphone should be a fun, trouble-free build!

[StephenGiles]

Quite honestly you would be far better of with an EH Guitar Synth - 3 tracking VCOs!

[anchovie]

Quite honestly you would be far better of with an EH Guitar Synth - 3 tracking VCOs!

After 40 hours of debugging, I expect he'd like something he can build in an evening!