Here's what I did to get this to work on a Pi 4 running moOde 7.3.0 2021-06-25:
1. Use USB-C to type A adapter so that the USB-C can still be used for power.
2. Plug into USB port, then connect headphones or other audio device to dongle to make sure that the Pi treats the dongle as being "in use".
3. Boot device and check that the dongle shows up as an audio device:
cat /proc/asound/A/stream0
you should see something like:
Apple, Inc. USB-C to 3.5mm Headphone Jack
4. Go to Audio -> MPD Config and make sure Audio output is set to "USB-C to 3.5mm Headphone Jack, then click SAVE
The default for mine was set to Pi HDMI 1
You can go to System Info to confirm that the correct audio device is in use.
Mine looks like this:
A U D I O P A R A M E T E R S
Audio device = USB-C to 3.5mm Headphone Jack A
Interface = USB
1. Use USB-C to type A adapter so that the USB-C can still be used for power.
2. Plug into USB port, then connect headphones or other audio device to dongle to make sure that the Pi treats the dongle as being "in use".
3. Boot device and check that the dongle shows up as an audio device:
cat /proc/asound/A/stream0
you should see something like:
Apple, Inc. USB-C to 3.5mm Headphone Jack
4. Go to Audio -> MPD Config and make sure Audio output is set to "USB-C to 3.5mm Headphone Jack, then click SAVE
The default for mine was set to Pi HDMI 1
You can go to System Info to confirm that the correct audio device is in use.
Mine looks like this:
A U D I O P A R A M E T E R S
Audio device = USB-C to 3.5mm Headphone Jack A
Interface = USB