[sdiy] Overcompression

[Harry Bissell Jr]

the other problem is detecting the difference in time
not to have pumping, breathing etc...

One way might be to have a short DIGITAL delay
(if I didn't care about quality I'd use a BBD :^)
before the audio mute... so you can process the signal
and make an intelligent decision.

This would work for radio OK but might give a 
"kung fu movie" effect to video...

H^) harry

--- John L Marshall <j.l.marshall at comcast.net> wrote:

> <snip>
> > Of course they are.  One thing I've wondered about
> for a long time is if 
> > it
> > would be possible to build some sort of a circuit
> that would sense that,
> > that there was no dynamic range to speak of,  and
> mute the damn thing.
> > Although how you'd get it to not respond to
> program material with loud
> > passages I'm not sure.
> </snip>
> 
> It seems to me that a peak voltage detector combined
> an average (or better 
> RMS) voltage detector would be suitable for sensing
> compression. If the peak 
> to average ratio is low, mute the audio. Properly
> setting the integrator 
> time (low pass filter) for the average detector
> would be tricky.
> 
> Take care,
> John 
> 
>