> An imaginary scenario might to to invent an algorithm to convert/transform sound/pressure wave information into another domain, one that is not dependent on s

> An imaginary scenario might to to invent an algorithm to convert/transform sound/pressure wave information into another domain, one that is not dependent on serial time, and then do the operations, and then re-convert it back to the time domain that we usually associate with sound processing. Where, within this alternative domain, parallel processing is possible. We already do this. It's called FFT, which transforms the data from the time domain to the frequency domain. You can, if you want/need to, parallelize frequency domain processing. There's oodles of interesting audio software that does this. But again, parallel processing is only interesting for speed. And we mostly have plenty of speed these days.