Google open-sources the Lyra audio codec
One thing I'm slightly worried about "machine learning" in compression rather than conventional everything-is-sines mathematical approaches is the possibility of odd nonlinear errors. Remember the photocopier that worked by OCR and would occasionally mis-transcribe numbers?<p>I don't mind compressing a phoneme to <unintelligible> as much as I would mind it compressing it to a clearly audible <i>different</i> phoneme.