"High"-bitrate lossy CBR compression is probably acceptable enough — at least compared with a voice codec! mp3 at max (320) is only 320 kB/s, doesn't have the security issues that variable-bitrate compression does, and preserves audio "ok" (it does delete the high frequencies above 20-22 kHz). No patent issues anymore, either.
Ogg-Vorbis may be an even better option for all kinds of reasons, but mp3 is more universally recognized.
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