On Sat, Oct 06, 2012 at 01:08:43PM +0200, Atte André Jensen wrote: > I tried it on a couple of files: > > atte@blokhus:~/music/bands/eldorado/mp3$ ls *.wav | xargs -iarg ebur128 arg > Integrated loudness: 13.7 LU > Loudness range: 3.8 LU > Integrated loudness: 13.0 LU > Loudness range: 2.2 LU > Integrated loudness: 6.0 LU > Loudness range: 3.6 LU > Integrated loudness: 10.8 LU > Loudness range: 4.5 LU > Integrated loudness: 12.9 LU > Loudness range: 3.2 LU > > Ok, so it seems the third file is softer than the rest, which is > very true. But how do I interpret those values, and how do I call > sox for a gain adjustment? A 'Loudness Unit' (LU) is the same as a dB. So if you want a loudness L and a file measures M, then you need to adjust by L - M dB. Beware of clipping if you apply positive gain. Future releases of ebumeter and ebur128 will measure peak level as well to make this easier. The basic sox command is IIRC: sox infile outfile gain value-in-db See the sox manpage for details. 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
