Doepfer

cv tape echo module.

perhaps you could do this with a tape cartridge that would be front
loaded on the panel. or maybe use a standard cassette tape mechanism
and use "looping" cassettes as the cartridges. (these are pretty cheap
and there are lots of different lengths, from 10 seconds to 20
minutes). then have cv control over feedback, echo & tape speed. then
also have a "sound on sound" loop record mode where you could have a
gate signal trigger the record function on/off. also, and i am not
sure if this is possible (and definitely not if you were to use the
"looping" cassettes"), but it would be cool to have the ability to
reverse the tape as well and have the direction controlled via cv with
a gate signal.

--david