Hendrik Jan Veenstra <h@...> wrote: > > Not sure if I understand you fully, but it sounds as if you're a bit > confused as to what samplers do. What you describe is exactly what > _every_ sampler does: a recorded note is played back at original > pitch/tempo at a certain key (like C3), and if you stretch it across > the keyboard, higher notes will play a higher pitch by speeding up > the sample -- and thus shortening it. Ditto in reverse for lower > notes. > So a 1 second sample, assigned to "original key = C3" will last only > half a second when you play C4 and 2 seconds when playing C2. That's > the basic principle of sampling and there's little you can do about > that. > > In order to avoid ugly artefacts you thus indeed need several sampled > pitches -- that's one of the reasons e.g. orchestral libraries > provide every single note instead of just one. > > What you're after is a kind of realtime "pitch change without > time-stretch". There is software that achieves this, but note of > those is (afaik) realtime, since the algorithms involved are rather > complicated. Logic's own built-in "Time & Pitch machine" is an > example of a piece of software that will let you do exactly this. While I agree with nearly all of the above there are already some realtime samplers/audio processors that do this. Probably Celemony (I have only heard the demos) and definitely Native Instruments Kontakt will do this for example. Kontakt doesn't do it very well though -- there are loads of obvious artifacts as when operating in this way it uses a granular synthesis approach to achieve pitch shifting without changing playback time. You wouldn't want to do this with acoustic instrument samples unless you wanted to mangle them. I think we can expect this capability to become increasingly common now that conventional software samplers are just about a dime a dozen and the processing power is almost there now to do just about anything that DSP systems are capable of -- eg physical modelling instruments etc -- just not all at once. Regards, Murray