[mythtv-users] High Volume during commercials

[Jorge Bianquetti de las Heras]

On Thu, 18 Oct 2007 09:21:07 -0700
David Brodbeck <gull at gull.us> wrote:

> 
> On Oct 17, 2007, at 11:24 PM, Jorge Bianquetti de las Heras wrote:
> 
> >
> >>> This sort of thing can be very difficult to detect and/or
> >>> control without an actual human in the loop.
> >>>
> >>> I seriously doubt is there is any truly effective way to
> >>> automate a solution to this problem, at least not at consumer
> >>> prices.
> >>
> >
> >
> > Why not use a software audio compressor/limiter on audio output
> > chain?
> 
> I don't think a compressor/limiter will do it.  I think the
> problem is the commercial audio is already heavily compressed to
> make it sound "louder" with the same peak level.
> 
> You'd have to compute the average level, I think, instead of just  
> limiting the peaks.
> 
> 

Of course. 

RMS Compressors works on average level, while limiters only works on
signal peaks.

If you apply heavy compression, de average level can be controlled by
make-up (or gain) control. OK. This is not perfect, but if you adjust
the controls with care, you can control the output signal. 

Obviously, if you mess the signal (overcompression), sounds like pure
trash....



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