http://arrrrv3dzzoluxubt3p24lpn7qu4rxuem3fb4kcmboji3dgpkgt4b2ad.onion/worter/bit-perfect-audio
Formerly I had this set to pipe straight to the ALSA device.
With Optical output, this would cause glitches when moving from a high bitrate to a lower one (96k -> 44k). configure Audacious Does not do the right thing yet.