[zamadatix]

http://www.rowetel.com/wordpress/?page_id=452 is a bit more exotic but should sound way better even though it caps out at 3.2 kbps.

[vackosar]

Impressive, the Codec 2 can go down to 0.7kbps! http://www.rowetel.com/downloads/codec2/hts1a_700c.wav