I purchased and received the M0 today. I wasn't clear how it could be wired up for use, so I decided to just buy one and try it. I'm also a new owner of the Sony WH-1000XM2, i believe an iPhone is the best transport and I want to send audio using LDAC to the Sony's. Knowing the iPhone doesn't have a DAC and can output pure digital to a DAC, I thought I could use the M0 to convert to LDAC and get high quality audio to the Sony's.
I also own the Audioquest Dragonfly Red and the Apple Lightning to USB dongle:
https://www.apple.com/shop/product/MK0W2AM/A/lightning-to-usb-3-camera-adapter
The M0 is set to USB DAC mode and BT to LDAC High. Sony's were paired with M0.
Here are the things I tried and results:
Apple dongle via USB to M0, with hopes of the M0 internal DAC passing audio via LDAC - no output (i believe the M0 can't be powered with this config to use it as a DAC?)
Apple dongle to Dragonfly Red, audio out into the analog headphone jack, with hopes of M0 passing audio via LDAC - no output
Late 2009 iMac (macOS 10.13.6) via USB to M0, with hopes of M0 passing audio via LDAC - no output
What gives? No audio in and no BT passthrough? How could i get this device to pass high quality audio to the Sony's via LDAC?
Thanks!