The latest audio "No, you're kidding, right?" ---
Upgraded to 3.2.21 (supposedly a release version). Attached Pro I/O module. Plugged in lavalier mic. Assigned ch 3 & 4 to Pro I/O analog. Set mode to phantom power. Worked like a charm. Powered down. Restarted camera. All settings remained in effect; no audio displayed on meters or recorded. The only way to get channels 3 & 4 functional is to toggle them off, then toggle them back to Pro I/O analog. EVERY time you power up the camera. Oy vey.