Hi
I find myself in the need of batch normalizing a lot of wav files (44.1kHz,
24bits) to "-1db peak". I don't know much about the technical details,
although I seem to understand that "-1db" is not as simple as that. I
looked to the command line tool normalize-audio and got quite confused. In
reaper I exported files with the rendering meter maxing at -1, I assume
this is the correct target gain. However if I just run normalize-audio on
the resulting file I get this:
atte@email-addr-hidden:~/downloads/normalize_test/test$ normalize-audio 0db.wav
Computing levels...
0db.wav 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)
Applying adjustment of 4.02dB to 0db.wav...
0db.wav 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)
So it seems that there's room for 4db of gain, which I find odd, as I
expeced the reaper render to be at -1db. So I looked at the manual, and
found the --amplitude option:
atte@email-addr-hidden:~/downloads/normalize_test/test$ normalize-audio
--amplitude=1db 0db.wav
normalize-audio: normalizing to -1.000000 dBFS
Computing levels...
0db.wav 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)
Applying adjustment of 15.02dB to 0db.wav...
0db.wav 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)
Looking at the waveform it now looks clipped. Total confusion here...
What is generally meant by "-1db peak", and is there a way to normalize a
wav to "-1 db peak" on the command line.
NB: First post here after switching to gmail, hope post goes through...
-- Atte
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@lists.linuxaudio.org
https://lists.linuxaudio.org/listinfo/linux-audio-user
Received on Wed Apr 22 04:15:01 2020
This archive was generated by hypermail 2.1.8 : Wed Apr 22 2020 - 04:15:01 EEST