[SoX-users] Fwd: Using sox to normalize rms and peak

[Francesco D. <fra...@so...>]

Hi we are trying to use sox to normalize a bunch of audio files to a
constant peak and RMS level.

Ideally sox filename -e stats should read

Pk lev dB Overall 0
RMS lev dB Overall -9

for all our files.

We managed to obtain the first value with -n option.
What we are missing is how to get RMS level of the files to the desired
db,leaving Pk level untouched.

We tried "gain -ne"  and "gain -nb" but they both vary the Pk level.
We also tried loudness option but it does not give us what we are looking
for.

Thanks

Francesco Danieli