Re: [SoX-users] R: Preventing clipping: norm or limiter

[Eric W. <nor...@yh...>]

Michele Cipriani <co...@mi...> wrote:
> Hello everyone,
> I have two question, hope you won’t them silly.
> 
> I am using sox to apply some effects to my tracks: compand, contrast
> 
> I am facing problems with clipping: sometimes applying those filters make the track clip, sox advise me at the end of the process as always.

For contrast, it introduces distortion that is not clipping.
I just started using this effect last week and was trying to find
an automated way to detect distortion with it (like the clipping
count in other effects), but could not find one.

As far as I know, you must rely on your playback system and ears to
detect this.  The "stats" effect won't help.  The level of contrast you
can safely introduce is heavily dependent on your the recording.

In other words, some quieter, distant recordings can use "contrast 100"
safely while a louder recording cannot even use "contrast 0" (the most
conservative level for the contrast effect).

For compand, try -G as Marco suggested.