Hi,
I ran some tests with different softwares and found that the replaygain values may significantly differ.
Here are the results I got in the following format
OS / software : track gain, track peak, album gain, album peak
Al Di Meola - Elegant Gypsy - Flight over Rio (MP3)
===================================================
WXP / FB2k : -3.95, 1.029111, -3.40, 1.076560
LMDE / wine + FB2k : -3.95, 1.029111, -3.40, 1.076560
LMDE / MP3Gain : -4.75, 1.029080, -4.20, 1.076527
LMDE / SndC + FB2k : -3.94, 1.000000, -3.40, 1.000000
LMDE / SndC + mtfl : -4.75, 1.000000, -4.20, 1.000000
Al Di Meola - Elegant Gypsy - Elegant Gypsy Suite (MP3)
=======================================================
LMDE / wine + FB2k : -4.42, 1.076560, -3.40, 1.076560
LMDE / SndC + FB2k : -4.42, 1.000000, -3.40, 1.000000
LMDE / SndC + mtfl : -4.68, 1.000000, -4.20, 1.000000
LateNightTales - Cinematic Orchestra - Ritournelle (FLAC)
=========================================================
WXP / FB2k : -7.86, 0.909882, -4.88, 1.000000
LMDE / wine + FB2k : -7.86, 0.909882, -4.88, 1.000000
LMDE / mtfl : -6.11, 0.909882, -5.13, 1.000000
LateNightTales - Cinematic Orchestra - Auntie's Harp (FLAC)
===========================================================
LMDE / wine + FB2k : -3.48, 0.991547, -4.88, 1.000000
LMDE / mtfl : -4.47, 0.991547, -5.13, 1.000000
Legends
=======
WXP : Windows XP SP3
LMDE : Linux Mint Debian Edition
wine : Windows on Linux 1.0.1
FB2k : Foobar2000 1.1.6
MP3G : MP3Gain 1.5.1
mtfl : Command-line FLAC metada editor 1.2.1
SndC : Gnome SoundConverter 1.4.4
flac : Command-line FLAC encoder/decoder 1.2.1
Conclusions
- Foobar2000 on Windows and on Linux gives the same results. So, wine doesn't alter the computation.
- Reincoding the original MP3 file to FLAC doesn't changes the gains but do change the peak values. Why is that?
- There is a difference between the gains computed by Foobar2000 and MP3Gain/MetaFLAC. In my test run, it can be as big as a 1.75dB difference! Why is that?
Can anybody explain those differences? What software is the more precise?
Regards,
Olivier