17 Oct
2006
17 Oct
'06
10:31 a.m.
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:
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.
John
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 !