Audio codecs like MP3 usually do a Fourier transform to move the sound into the frequency domain, discard any frequencies that you’re unlikely to notice, and encode ‘rate of change’ for the remaining ones. So the encoding problem is usually sound with fast changes in intensity or frequency, which is basically what percussion is.

System is quite percussion heavy, so will sound bad.

Recently moved from Spotify to Qobuz, because fuck Dan Ek, and the fact that they’ve got better bitrates across the board really makes the difference for jazz and jazzy stuff. Neglected, sounds crap on Spotify. Sounds great on Qobuz. But that’s the change from ‘bad’ to ‘quite good’ bitrates; additional bits are very much a case of diminishing returns.