Using the latest Mac 2019 version and build. First install. I have my volumes turned up (I have sound on any other application outside of BIIB). The VU meters do move but no matter if I use the demo songs or enter my own chords, it's silent. Even just auditioning any style won't let me hear anything. When testing my output on Audio Devices, I do hear sound. MIDI ports set to MIDI plugins. Tried factory settings, both default Apple MIDI choices (Synth, Core). Tried rebooting. Nothing works.