Improving ReplayGain
Reply #22 –
3. ReplayGain lossy approximation
Storing this seems pointless to me, since ReplayGain calculations will become inaccurate after transcoding and no tool should be copying ReplayGain values when transcoding.
the inaccurancy is minimal enough to be dismissed. This is a small test I made:
Iron Maiden - [Dance of Death #04] Montségur [5:48]
PCM
-10.54 dB
PCM --> MP3
-10.55 dB
PCM --> MP3 -->Musepack
-10.53 dB
PCM --> MP3 -->Musepack --> Vorbis
-10.57 dB
PCM --> MP3 -->Musepack --> Vorbis --> Wavpack (Lossy)
-10.57 dB
PCM --> MP3 -->Musepack --> Vorbis --> Wavpack (Lossy) --> Nero MP4
-10.54 dB
The biggest difference was -0.03dB which is a -0.284% diff from the original, I picked this track because is loud enough to make most lossy encoders go beyond full scale.