MOTM

On Friday 31 October 2003 18:24, Paul Schreiber wrote:
> Just like I responded to the request for the ARP filter
> (I hope to have prototypes by mid-Nov), I am in 'contact'
> with a potential source for a digital delay and
> sampler/looper MOTM delay module. Stay tuned for more
> info as this progress.

Ohhhh, a MOTM *looper*. :))
I own two Repeaters and a Lex MPX-G2 with 10 secs of delay, 
but having this in MOTM format with sounds *very* nice.

>
> I'm trying to do one with at least 2 CV "parameters" for
> <$400 (assembled only, as it's all SMT). I'd like to get
> $300, but I don't think I can liscensing another design.
>
> So, fell free to start posting "list of desired
> features". I can't say how flexible I can be in changing
> the DSP code.

For a good looper you need aprox 10 secs delay, \ufffdthe more 
the better.

You'd need CV feedback conyrol. By reducing the feedback, 
you get the chance to 'clean' the loop and make room for 
new material to be fed into the loop.  

A CV record/play mode switch is needed. 

When  switching in/out record mode, no clicks/ticks/whatever 
should be produced.

No clicks/ticks must be heard when the loop 'returns' to the 
start of the buffer, even when a long ambient sound is 
recorded.

A lowpass filter for emulating an analog delay is needed, 
with CV control. But because we all have filters around, 
maybe it is possible to insert a filter into the loop 
signal. That takes an DA and DA converter, so the built-in 
LPF is probably a better choice.

- Robert