I ordered 2 of these (A96010) a while back and tried to build a looper for some fun with my guitar based on this very cool instructable. Here is the link where the spec sheep is available for the parts I have.

http://www.electronics123.com/s.nl/it.A/id.499/.f?category=2

I had built a working model. I didnt mind the pause between loops, or oscollation that would build up after a a handfull of loops, the only thing that it lacked was the ability to have a live signal get through at the same time a loop was playing back, so I could play overtop. Maybe he on/off (single pole) play button iscolated the signal? I also tried having the input connected to the input terminal as well as the output jack simoultaneously with no result. I would be glad to build an instructable if any of you could take a look at the chip and throw ideas at me to troubleshoot. I have dismantled the pedal since (and stupid me didnt evan get one pic while it was assembled) but now I have an opportunity to start from square one, and record my progress to share it with all. + I plan on building 2 of these.