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-ebu-r128-calm-act/), > 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) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
