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 ! A fast peak limiter could still do this. But even here it can be avoided by look-ahead, i.e. having a short delay on the audio which in turn allows a finite attack time. A fast limiter needs a higher sample rate or interpolation anyway, just to detect the correct peak level. Remember that 'THE SAMPLES ARE NOT THE SIGNAL'. The real peak level of a signal when converted to the analog domain can be several dB above that of the highest sample. -- FA Lascia la spina, cogli la rosa.
