Hello Tobias, following Ross advice one of the drawback that you will have to deal is the CPU usage at high master frequencies. Placing in an overlap and add fashion a grain is very convenient at low freqs but not so much at high. More over you will have to deal with some sort of DC offsets on the way (OLAdding the minBLEP grain - which is min-phase and not zero-phase and you should consider also some sort of look-ahead - with small hopsizes and maybe for short times because you are under a frequency master modulation will result in unpredictable offsets over your sin. Unfortunately Eli Brandts does not face this problem in the paper.
Hard-sync is hard so expect aliasing to be reduced but not completely eliminated. Ciao Marco -----Messaggio originale----- Da: music-dsp-boun...@music.columbia.edu [mailto:music-dsp-boun...@music.columbia.edu] Per conto di Ross Bencina Inviato: martedì 25 febbraio 2014 20:49 A: A discussion list for music-related DSP Oggetto: Re: [music-dsp] Best way to do sine hard sync? On 26/02/2014 2:25 AM, robert bristow-johnson wrote: > are you trying to do multiple cycles of the sine and then have a > discontinuity as it snaps back in sync with the side-chain waveform? > if so, that doesn't sound very "bandlimited" to me. As I understand it, the question is now to make such snap-back band limited. The approach that I am familiar with is the "corrective grains" approach (AKA BLIT/BLEP/BLAMP etc) where you basically run a granulator that generates grains that cancel the aliasing caused by the phase discontinuity. The exact grain needed is dependent on the derivatives of the signal (doable for sine waves). The original paper for this technique is Eli Brandt (2001), "Hard sync without aliasing", Proc. ICMC 2001.: http://www.cs.cmu.edu/~eli/L/icmc01/hardsync.html I have not read Vadim's paper so I am not familiar with the alternatives. Ross. -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
