Digital delay (was MN3005, MN3007)

[Michael Rogers]

Jeremy Brookes <bluebear at enterprise.net> wrote:
>>The infinite delay is not practical realizeable without a kind of
>>compression. You could dial the feddback only close to infinity, on one
>>side the signal would slowly fade, on the other it wold rise and rise,
>>until total distortion/and or oscillation. I think it needs a jard limiter
>>before the delay to get a real infinite delay without this problems.
>
>
>The infinite repeat was from Michael Rogers who was referring to a DOD
>digital delay pedal. Being digital I guess it would be quite easy for the
>feedback to be in the digital domain, whereas the compressing and expansion
>only apply to the analogue input and output, not the feedback loop. Or I
>might be wrong :)

The NE570 only affecting the input and output of the delay section would
suit me fine... in fact it might mean I only have one component to
replace. However I'm hoping the feedback loop is analogue, otherwise the
block diagram I've been drawing in my head is totally screwed. What
puzzles me is, if all the feedback and input mixing goes on in the
digital domain what is the pedal doing with five dual op amps (plus
compander and various other chips)?

Michael Rogers