a) any
non-linearity introduces harmonics, some non-linearities
> introduce an infinite amount of harmonics, which will cause foldover
> distortion. the large the sampling-rate, the lower the foldover.
Although
this is mostly true, it's difficult to believe it matters in
a practical audio application. If it does, in most of the cases that
are not deliberately using a highly nonlinear transfer, adding one
additional bit of depth will get you the same noise/distortion benefit
as doubling the sampling rate. Once you're using 32 bit floats,
you're already 160dB down... If you need more, I'd love to know what
you're doing, and I'm not being sarcastic!
my main use-cases for high sampling rates are coupled/feedback fm/pm and
stochastic synthesis (gendy). though today, i just wanted to mix some
192khz recordings and some people claimed that 48k is enough for everyone.