[vorbis] adjust gain without reencoding

[Peter Harris]

Markus Gaisbauer wrote:
> 
> is it possible to make ogg files louder (normalize) without reencoding 
> it. for example is there a simple db gain parameter that can be set to 
> -5 db or whatever.

If your playback device supports the (unofficial) replaygain spec, you 
simply add the following tag to your vorbis file:

REPLAYGAIN_TRACK_GAIN=-3.6800 dB

Of course, using vorbisgain is a lot easier.
http://users.pandora.be/sjeng/vorbisgain.html

At least Foobar2000, Winamp, and XMMS support this spec; I'm not certain 
about other players.

Peter Harris

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