Linux audio tools: Is there a way to normalize the volume of .ogg files?

"Checkout the appropriately named Normalize:

Normalize is a tool for adjusting the volume of audio files to a standard level. This is useful for things like creating mixed CD's and mp3 collections, where different recording levels on different albums can cause the volume to vary greatly from song to song.

It works for all types of file formats, including wav, mp3 and .ogg."

"You could investigate Replay Gain. I've not played with it much, but my understanding is that it scans a file (or directory/album) and adds meta-data to the tags, so that a Replay Gain aware player then adds the required amount of gain during playback to normalise the volume level.

Advantages: no decode/recode process, so faster, and no extra audio degradation due to re-encode

Disadvantages: Replay aware player(s) required."