Horrible. I actually tried applying image compression to sounds over a decade ago (was still in school, did that for Jugend forscht). I used a Fourier transform to generate image sections of a specific window of samples and used that. In hindsight, perhaps just treating the waveform as image data may have been better. The idea behind what I did was to see whether a spectrogram can be compressed well, considering that there's lots of repetition and blank space usually.
In any case, JPEG murders pretty much everything in thag representation.
In any case, JPEG murders pretty much everything in thag representation.