Novation's Peak synth has its raw voice's waveforms generated by FPGA, it just spews out the final part through a DAC that then goes through analog filters. Many other soundcard/FX companies are now implementing DSP stuff through FPGA. I have not found a wealth of information regarding how these are all implemented when compared to traditional DSP but you can find some academic papers even. There are more barriers when it comes to FPGA since you are confined to a small subset of tools and then the need to shift paradigm for FPGA thinking. Would love to know what people are using as test boards and if they're willing to share their experiences.
A delay line would simply imply hooking up the FPGA to some external memory since speed is not an issue given typical sampling rates. Or did you have something else in mind Evan? Typical image processing done with FPGA use off-chip memory (cheap) to store images since these also do not require high speed I/O for image store and retrieval. (think background correction) On Thu, Sep 14, 2017 at 6:53 PM Evan Balster <e...@imitone.com> wrote: > Hey, Theo — > > Rather than expensive math library calls, I'd be interested to see results > from an experiment with linear filtering. How much space does a biquad > filter take up? What about a delay line? How much does that decrease when > you drop to single-precision? Can you disable denormals to save even more > space? > > – Evan Balster > creator of imitone <http://imitone.com> > > On Thu, Sep 14, 2017 at 4:02 PM, robert bristow-johnson < > r...@audioimagination.com> wrote: > >> >> >> well, i know of at least one company that uses an FPGA to replace the >> ASIC they used to use. they use it to fetch samples, interpolate and loop. >> also to do some post-processing DSP to the note. >> >> >> >> -- >> >> 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 >> > > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp
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