Emu XL-7 & MP-7 User's Group

--- Wesley D <Serfiss@...> wrote:
> You had implied that one would need to use software, or a sampler to
> reverse a rom on a synth.

I just said that no current E-mu hardware synth with 128 voices will be
able to play samples reversed in realtime.

> Why would having more voice capacity make it impossible to have the
> reverse feature?  My computer has more than 64 voices and it has no
> problem reversing samples.....

Pitch-shifting sample playback is complicated.  E-mu uses a very high
quality pitch shifting technique that invloves the use of many input
samples to generate a single output sample.

The short story is that to perform these conversions, lots of memory
bandwidth is needed.  The more voices you play, the more memory
bandwidth you need.  At 128 voices, the available memory simply wasn't
fast enough to keep up.  The patented solution to that problem
unfortunately precluded reversing samples in realtime.

E-mu doesn't hype the quality of their pitch shifting very much these
days, but they're probably the best in the business.

-Aaron

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