MP3Gain also writes a Replaygain header which applies to the whole MP3 file. MP3Gain then writes to the global gain header of every block, adjusting them all up or down by the same amount in order to achieve those Replaygain values. MP3Gain determines the Replaygain values for the MP3 file. In addition to these global gain fields, each MP3 file can also have a Replaygain header which applies to the whole file, and which tells a Replaygain-aware MP3 player how loud to play that file. Each block has a global gain field which tells an MP3 file player how loud to play that block. Each block corresponds to a few milliseconds of music. c=24527&hl)Īn MP3 file is composed of many blocks of audio, one after the other. Here is a clear explanation about what MP3Gain does, extracted from an old thread of hidrogenaudio's forums (. MP3Gain works with mp3 files, but its implementation has certain particularities. There are many tools, either integrated with audio players or converters (foobar2000, MediaMonkey, Winamp, soundKonverter, etc) or as standalone apps (MP3Gain, VorbisGain, AACGain, etc.) that analizes files, per track or per album, and implement the volume adjustement level.

ReplayGain is an algorithm that, applied on audio files, allows the normalization of their perceived volume.

You are confusing the concepts, but you're not totally mistaken. ReplayGain just adds some information to the tags and only works on players that support it. MP£ Gain actually alters the MP3 file so it's volume is the same on any device playing it. Carbonize wrote:Unless something has changed since I last played with these things what MP3 Gain does and what ReplayGain is are two entirely different things.

Mass mp3 normalizer