Re: [LAU] Fwd: Normalizing Audio Levels using RMS

I only know a bit more about replaygain. It's originally designed for playback, to get all those commercially mastered albums and tracks to the same level so you don't need to twist the volume knob all the time. That's why it usually writes the adjustment information into tags that the player can read and adjust volume accordingly (a CD is a final product, you don't want to change it as listener). Anyway, there are programs for most formats available, the one you are looking for is called wavegain [1]. Replaygain works either on tracks or albums, so take track on some file and it calculates/adjusts that file. wavegain doesn't use tags afaik but changes the file directly, maybe with limited granularity, but when you say that 1.5dB is fine I'm sure it can do that. The levels replaygain uses are 83dB originally and 89dB in practise for some reason. But this can be adjusted, you just need to figure out how these 89dB relate to other figures you know/need. There was a lengthy thread somewhere on the hydrogenaudio forums that explained how these dB are calculated but I can't find it atm. So even if it's not made for that purpose it can work. It would be neat if someone would write a implementation that could be used for what you are doing more easily, maybe as a plug-in if that's somehow possible. [1] http://www.rarewares.org/others.php#wavegain Best regards, Philipp