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 labeled “Properties For” choose “Built-in Line Output.”
3) Under “Audio Output,” set the format to “44100.0 Hz.”
4) Quit Audio MIDI Setup and restart Processing.