sound logic and advice— thank you.
my logic in considering/inquiring was that,with only 2 pins per master and 2 pins per slave on the Cockpit, given it’s a stereo module, that must then be L and R channels of audio— no power voltage to consider. i believe the Hyrlo has 3 pins, so just murkier logic— 2 ch, of audio plus ground?
anyway/still: thank you for your quick help.