5 Oct
2012
5 Oct
'12
9:13 p.m.
On Fri, Oct 05, 2012 at 07:12:00PM +0200, Georg Holzmann wrote:
Do you just want to adjust the loudness between
multiple files?
(this means there is just a constant gain for every file so the they
are similar on average)
Or do you also want to change the loudness inside one track?
For case 1, you have to measure the loudness somehow (best way would
be to use a loudness standard like used in EBU R128 - see
https://auphonic.com/blog/2012/08/02/loudness-measurement-and-normalization…),
and then you apply a constant gain, combined with a limiter (and
maybe compressor) if the gain is positive.
Or use ebumeter (real-time, GUI) or ebur128 (batch processing).
The latter combined with some scripting and sox (or doing it
manually) will provide what you need.
Both available from:
<http://kokkinizita.linuxaudio.org/linuxaudio/downloads>.
LAC paper on the theory behind this:
<http://kokkinizita.linuxaudio.org/papers>
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)