Work's like a charm! I've implemented wavetable osc in Xaoc Batumi module, that's why it makes me interested. Looking forward to do some comparison. Thanks!
sob., 4 sie 2018, 01:11 użytkownik robert bristow-johnson < r...@audioimagination.com> napisał: > > > > lemme know if this doesn't work: > https://www.dropbox.com/s/cybcs7tgzgplnwc/wavetable_oscillator.c > > remember that this is *synthesis* code. it does not extract wavetables > from a sampled sound (i wrote a paper a quarter century ago how to do that, > but it's not code). nor does it define bandlimited square, saw, PWM, > hard-sync, whatever. that's a sorta difficult problem, but one that > someone has for sure solved and we can discuss here how to do that (perhaps > in MATLAB). extracting wavetables from sampled notes requires pitch > detection/tracking and interpolation. > > L8r, > > r b-j > > ---------------------------- Original Message ---------------------------- > Subject: Re: [music-dsp] Antialiased OSC > From: ćwiek <nap...@gmail.com> > Date: Fri, August 3, 2018 6:00 pm > To: r...@audioimagination.com > music-dsp@music.columbia.edu > -------------------------------------------------------------------------- > > > Can you provide the code with something like pastebin/ Dropbox / gdrive? > > I'm also very interested in seeing this implementation. > > Thanks, > > napent > > > > sob., 4 sie 2018, 00:57 użytkownik robert bristow-johnson < > > r...@audioimagination.com> napisał: > > > >> > >> > >> ---------------------------- Original Message > ---------------------------- > >> Subject: [music-dsp] Antialiased OSC > >> > From: "Kevin Chi" <s...@finecutbodies.com> > >> Date: Fri, August 3, 2018 2:23 pm > >> To: music-dsp@music.columbia.edu > >> > -------------------------------------------------------------------------- > >> > > >> > Is there such a thing as today's standard for softSynth antialiased > >> > oscillators? > >> > >> i think there should be, but if i were to say so, i would sound like a > >> stuck record (and there will be people who disagree). > >> > >> > >> stuck record: "wavetable ... wavetable ... wavetable ..." > >> > >> > >> > > >> > I was looking up PolyBLEP oscillators, and was wondering how it would > >> relate > >> > to a 1-2 waveTables per octave based oscillator or maybe to some other > >> > algos. > >> > > >> > thanks for any ideas and recommendations in advance, > >> > >> if you want, i can send you a C file to show one way it can be done. > >> Nigel Redmon also has some code online somewhere. > >> > >> if your sample rate is 48 kHz and you're willing to put in a brickwall > LPF > >> at 19 kHz, you can get away with 2 wavetables per octave, no aliasing, > and > >> represent each surviving harmonic (that is below 19 kHz) perfectly. if > >> your sample rate is 96 kHz, then there is **really** no problem getting > the > >> harmonics down accurately (up to 30 kHz) and no aliases. > >> > >> even though the wavetables can be *archived* with as few as 128 or 256 > >> samples per wavetable (this can accurately represent the magnitude *and* > >> phase of each harmonic up to the 63rd or 127th harmonic), i very much > >> recommend at Program Change time, when the wavetables that will be used > are > >> loaded from the archive to the memory space where you'll be > >> rockin'-n-rollin', that these wavetables be expanded (using bandlimited > >> interpolation) to 2048 or 4096 samples and then, in the oscillator code, > >> you do linear interpolation in real-time synthesis. that wavetable > >> expansion at Program Change time will take a few milliseconds (big fat > >> hairy deal). > >> > >> lemme know, i'll send you that C file no strings attached. (it's really > >> quite simple.) and anyone listening in, i can do the same if you email > >> me. now this doesn't do the hard part of **defining** the wavetables > (the > >> C file is just the oscillator with morphing). but we can discuss how to > do > >> that here later. > >> > >> > >> -- > >> > >> r b-j r...@audioimagination.com > >> > >> "Imagination is more important than knowledge." > >> > >> > >> > >> > >> > >> > >> > >> _______________________________________________ > >> dupswapdrop: music-dsp mailing list > >> music-dsp@music.columbia.edu > >> https://lists.columbia.edu/mailman/listinfo/music-dsp > > > > > > > > > > > -- > > r b-j r...@audioimagination.com > > "Imagination is more important than knowledge." > > > > > > > > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp
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