Originally Posted by kamal007
and when i scan them, which one do i choose? albumgain, replaygain, single album? the more i read the more im confused
Album gain is preferred when scanning albums, track gain when scanning a bunch of unrelated tracks.
In players that are able to use it (Squeezebox for example) there is a feature called "Smart Gain" that will be aware if you are playing an entire album or playing a random mix.
If you are playing an entire album it will preserve the relative dynamics of the album, that is, a song that was designed to be louder that other songs on the album will still be louder.
If you are playing a random mix the player will keep the average volume of each track the same.
I know that the Squeezebox can use Smart Gain, but I'm not sure which other players can. In fact, it may be exclusively a SlimDevices thing for all I know.