A few of my students have run into an issue where the right speaker is distorted when playing audio through Minim or Sonia. After much googling we found a somewhat convoluted solution:

1) Go to Applications / Utilities and open Audio MIDI Setup.

2) In the drop-down labeledProperties ForchooseBuilt-in Line Output.

3) UnderAudio Output,set the format to44100.0 Hz.

4) Quit Audio MIDI Setup and restart Processing.