Re: [linux-audio-dev] Paper on dynamic range compression

Dan Mills wrote:

>
> --- Erik de Castro Lopo <mle+la@email-addr-hidden-nerd.com> wrote:
>
> > You need a low pass filter on the control signal. It
> > should
> > be somewhere well below 1kHz.
>
> Agreed that you need the filter, but a 'brick wall' at
> 1Khz means that anything faster then 50ms or so as an
> attack time (and there are legit uses for such), will
> itself overshoot horrribly due to the gibb effect of
> bandlimiting the control signal.

This is the way analogue compressors work. If you have a
sound with a fast transient going into a slow attack
compressor, the transient passes throught pretty much
untouched (apart from any clipping that may occur due
to other parts of the design).

Erik

-- 
+-----------------------------------------------------------+
  Erik de Castro Lopo
+-----------------------------------------------------------+
Failure is not an option. It comes bundled with your Microsoft
product.