Re: [LAU] keeping same perceived level on mp3 files

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To: <linux-audio-user@...>
Date: Saturday, October 6, 2012 - 12:55 pm

On Sat, Oct 06, 2012 at 01:08:43PM +0200, Atte André Jensen wrote:

> I tried it on a couple of files:

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)

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Messages in current thread:
[LAU] keeping same perceived level on mp3 files, Atte André Jensen, (Fri Oct 5, 4:30 pm)
Re: [LAU] keeping same perceived level on mp3 files, Georg Holzmann, (Fri Oct 5, 5:12 pm)
Re: [LAU] keeping same perceived level on mp3 files, Fons Adriaensen, (Fri Oct 5, 7:13 pm)
Re: [LAU] keeping same perceived level on mp3 files, Atte André Jensen, (Sat Oct 6, 11:08 am)
Re: [LAU] keeping same perceived level on mp3 files, Fons Adriaensen, (Sat Oct 6, 12:55 pm)
Re: [LAU] keeping same perceived level on mp3 files, Georg Holzmann, (Sat Oct 6, 11:51 am)
Re: [LAU] keeping same perceived level on mp3 files, Atte André Jensen, (Sun Oct 7, 6:56 pm)
Re: [LAU] keeping same perceived level on mp3 files, Fons Adriaensen, (Sun Oct 7, 10:30 pm)
Re: [LAU] keeping same perceived level on mp3 files, Atte André Jensen, (Mon Oct 8, 6:19 am)
Re: [LAU] keeping same perceived level on mp3 files, Fons Adriaensen, (Mon Oct 8, 8:21 pm)
Re: [LAU] keeping same perceived level on mp3 files, Atte André Jensen, (Mon Oct 8, 6:01 pm)
Re: [LAU] keeping same perceived level on mp3 files, Fons Adriaensen, (Sun Oct 7, 9:34 pm)