On Tue, Nov 10, 2020 at 05:16:29PM -1000, david wrote: > On 11/10/20 12:10 PM, Fons Adriaensen wrote: > > > If you want a constant loudness then normalisation as discussed in this > > thread (i.e. on peak level) is _not_ the way to go. You should normalize > > on RMS level or a dedicated loudness metric such as EBU-R128. > > Hmm. That's something I prefer, too. How do you do that? To measure loudness of a sound file, use ebur128, e.g. ebur128 sheryl_crow-all_i_wanna_do.wav which will print: Integrated loudness: 7.4 LU Loudness range: 2.8 LU Peak level 0.3 dB A few lines of bash can parse this and call e.g. sox with the right arguments. In this case, to have standard loudness you'd reduce the level by 7.4 dB. Note that this file also has inter-sample peaks above full scale. -- FA _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
