normalize-audio -m ./* doesn't normalize

[Pablo José Cabrera Muñoz]

pablo@gargamel:~$ lsb_release -rd
Description: Ubuntu 16.04.4 LTS
Release: 16.04
pablo@gargamel:~$ apt-cache policy normalize-audio
normalize-audio:
  Installed: 0.7.7-13
  Candidate: 0.7.7-13
  Version table:
 *** 0.7.7-13 500
        500 http://br.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

I've got two mp3 files within a directory and wanted to normalize them with -m option.

pablo@gargamel:~/temp/a$ ll
total 26800
drwxrwxr-x 2 pablo pablo 4096 Mai 4 10:08 ./
drwxrwxr-x 4 pablo pablo 4096 Mai 14 16:11 ../
-rw-rw-r-- 1 pablo pablo 7354937 Mai 17 14:05 [Dio]-[Night People].mp3
-rw-rw-r-- 1 pablo pablo 20074604 Mai 17 14:05 [Trivium]-[The Crusade].mp3
pablo@gargamel:~/temp/a$ normalize-audio -m ./*
Computing levels...
 [Trivium]-[The Cr 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)
Applying adjustment of 6,08dB to ./[Dio]-[Night People].mp3...
 [Dio]-[Night Peop 100% done, ETA 00:00:00 (batch 27% done, ETA 00:00:00)
Applying adjustment of -3,54dB to ./[Trivium]-[The Crusade].mp3...
 [Trivium]-[The Cr 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)

The files get overwritten but the audio levels aren't normalized. In fact, when I run it again, it computes the same adjustment for each file respectively.

pablo@gargamel:~/temp/a$ normalize-audio -m ./*
Computing levels...
 [Trivium]-[The Cr 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)
Applying adjustment of 6,08dB to ./[Dio]-[Night People].mp3...
 [Dio]-[Night Peop 100% done, ETA 00:00:00 (batch 27% done, ETA 00:00:00)
Applying adjustment of -3,54dB to ./[Trivium]-[The Crusade].mp3...
 [Trivium]-[The Cr 100% done, ETA 00:00:00 (batch 100% done, ETA 00:00:00)