Audio Format Listening Tests Concluded
Pointing to the conclusions of this listening study, nullity writes: "The results are interesting, and show a high variation in the performance of the various codecs on different musical styles. Ogg seems to work well on dance music, WMA8 on chamber music, etc."
OGG is not an audio codec. vorbis is. So get ir right.
Someday, I'll have a real sig.
I haven't tested it myself, but speex is both free and intended for this.