--- Steve Harris <[EMAIL PROTECTED]> wrote: > These are aliasing artifacts in the sidechain > though, right? So they will > show up as modulations in the output, rather than > directly audible > aliasing.
The last thing almost all software compressors do is something of the form output = gain * sample; If either gain or sample contain aliasing, or if the sum of their bandwidths would cause aliasing then there will be aliasing present at the output. To an extent what happens earlier is in the sidechain is less important as long as the last condition can be met at the 'gain cell'. Audio_bw + Gain_bw must be < 0.5 * SR at the gain control multiplier. To address Erics point, in a slow 'gain riding' compressor your point is valid, but this fails for things like fast limiters or even for something like an emulation of an SSL Mix bus comp, which has some seriously fast attacks available. Further, it is not the instruments fundamental that is the problem, as energy in the harmonics will also get aliased quite happily (And the aliasing products are non harmonically related). I am going to code it up, we will see what happens when we have something measurable (and listenable). Regards, Dan. Send instant messages to your online friends http://uk.messenger.yahoo.com