jimmy;133805 Wrote: 
> anyway, i just analysed a load of mp3s using the mp3gain gui. most of
> the files have a volume well above 89dB which I expected. however, for
> most files above about 93dB the "clipping" column has a "Y" in it. I
> don't really understand the technicalities of clipping but it seems to
> me that if you lower the volume of a track then there is no way you get
> clipping...?
> 
> can anyone explain why a track with a negative suggested track gain
> could suffer from clipping?
> 
> thanks
> jimmy

I've seen the same as well and I'm not entirely sure.

One possibility:

Many CDs these days are clipped at source.  Sad but true, take a look
at one of these tracks in Audacity with the zoom turned way up.  If
that's the case, no amount of volume reduction will ever eliminate
clipping, the tops of the waveforms are gone forever.

That said I'm not sure how MP3Gain calculates clipping.  I doubt it's
that sophisticated and able to determine that there are x samples in a
row at full scale.  Plus I recall if you set your target low enough you
can eliminate the clipping indicator, which can never be true for one of
these poorly mastered CDs.


-- 
Mark Lanctot
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