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Analogue-sequencer

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RE: [analogue-sequencer] p3 & a memorymoog in a week .

2005-08-27 by Colin f

> > The latency on the JP8, including MIDI latency, was between 4 and 10
> > ms, averaging about 6ms.
> 
> This is considerably better than the official SCi midi 
> interface on the
> Prophet 5. This suffers from around 12mS to 15mS and it is 
> noticeable to
> the discerning ear.

Both figures suggest voice assignment is being done in the main program
loop, rather than in the MIDI reception interrupt routing.
If I were re-writing the OS, voice assigment would be the highest priority
task, and would certainly be done within 1ms or so of the message arriving.
Maybe the JP8 and P5 are similar enough that a re-write for one would adapt
easily to the other.
I tend to think I'd use a replacement CPU, rather than a re-write, both for
reasons of performance, and to prevent it being a waste of time
commercially.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com

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