hi all .. i have a tricky problem and am kind of stuck.

i want to simulate a sampler with variable samplerate, more precisely the sequential circuits prophet VS. ... this synth used wave data with 128 samples each and had 32 oscillators that were tuned via subdividing a fixed clock rate into variable bitrate DACs.

ie. playing a sample at 200 hz clockrate resulted in a DAC samplerate of 200 x 128 = 25800 hz ... this of course results in totally different aliasing than fixed samplerate because the nyquist frequency moves harmonically with each tuning.

im trying to simulate that in PD with over/undersampling but how?

here is how it sounds now: http://tindeck.com/listen/jvchf

@lilakmonoke these dphasor~ abstractions try to do something similar I think https://forum.pdpatchrepo.info/topic/6759/new-anti-aliasing-and-phase-distortion-abstractions.
Post number 4 describes it in more detail.

this is really intersting and based on the same idea i think. im not sure if it will work with samples but maybe it includes a solution to that too. thanks!

if somebody has another solution please let me know. variable samplerate is the solution to all disharmonic aliasing! it will still alias but in a good way ... here is an interview with one of the inventors of this synth where he explains why ...

more discussion about harmonic aliasing:

https://forum.pdpatchrepo.info/topic/11176/adaptive-sample-rate-and-harmonic-aliasing-in-pd

.

this is a video on a different topic but at one point he describes using windowed band limited impulses order to simulate other sample rates @ 20:52

you can obviously use a lowpass filter with samphold~ also..

really interesting this guy is from waldorf, who definitely know how to write brilliant audio code ... im not sure i would know how to do this in pd so id love to see an example patch.

ive just tried the approach by acreil and this works! its rather simple too, all you have to do is find a close integer relationship between the number of samples in your waveform, (128 in my case) and the frequency you want it to be played. ie. 8 : 5 x 128 and voila ALL DISHARMONIC ALIASING DISAPPEARS and turns into harmonic overtones, no matter how high the frequency is.

ill include a patch soon ...