On Tue, Oct 17, 2006 at 01:53:40 +0100, John Rigg wrote: > On Tue, Oct 17, 2006 at 11:56:20AM +0200, Fons Adriaensen wrote: > > On Mon, Oct 16, 2006 at 07:48:35PM +0100, Dan Mills wrote: > > > The gain control signal has energy right the way out > > > to the band limit (and probably aliased around it), > > > never mind what happens when that hits the multiplier! > > > > The question is: how much of this HF energy is there ? > > There shouldn't be much in a compressor with controlled > > attack / release times. In that case it is always possible > > to filter the control signal. In fact the obvious way to set > > attack / release times is by such filtering ! > > True, but if the audio signal contains significant HF energy near > the band limit, it doesn't take a very fast gain change to push it > past that. Bear in mind that the ear is _very_ sensitive to aliasing > artifacts, so `significant' can be a very small amount.
These are aliasing artifacts in the sidechain though, right? So they will show up as modulations in the output, rather than directly audible aliasing. - Steve