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My takeaway from the associated links in this thread is that the key benefit to an FPGA is that it runs at a much higher rate than DSP-based technology, and thi
by jonnydubowsky 8y ago
My takeaway from the associated links in this thread is that the key benefit to an FPGA is that it runs at a much higher rate than DSP-based technology, and this has a direct impact on the clarity of sound.
- shams93 8y agoIt's the extreme low latency, while yes you can do a lot with just a pi, still we are talking around 20ms latency. With this setup we are talking about digital hardware synths running at sub 2ms latency.
- klodolph 8y agoI saw some links in this thread, but they look like marketing materials to me. Aliasing is more or less solved problem, and the claim that running a DAC at 24 MHz makes it “better” in any measurable way seems ridiculous at face value. I don’t know what is actually going on, but as far as I know they’re just taking a delta-sigma DAC and talking big talk about the oversampling. In truth, oversampling here is usually just a boring engineering choice where you trade off bandwidth and SNR. If the Novation Peak is running an 8-bit DAC at 24 MHz, they might be making it perform equivalently to a 16-bit DAC at 48 kHz—note the ratios. This is not anything new, it’s just something old that happens to have big numbers in it.
- bayesian_horse 8y agoThe way I understand it is that you can do a lot of DSP related work in the FPGA such that a Microcontroller board can do more sophisticated stuff than otherwise. For makers and hobbyists, the power efficiency is less of an issue, in general. But FPGAs may enable a battery powered application where it wouldn't be possible otherwise. Also, for learning advanced FPGA programming, audio and DSP seem to be a fruitful playground.