I did try RPi4 with UAC2 input from my Mac and iPhone. But didn’t know why the sample rate fixed at 48KHz. Changed macOS’s Audio MIDI setup from 44.1 to 192 but no work, RPi4 always at 48KHz.
The way I did:
-
Added one line on the config.txt file under root directory:
dtoverlay=dwc2
then started the RPi4, power provided by Mac’s USB port (type c to c). If using iPhone as the music source the RPi4 must use the other power source like iFi’s iUSB3 then iPhone using camera adapter and USB cable to connect the iUSB3. -
Added one line in the hqplayerd.xml (under USBStreamer declarations):
<input channels="2" device="uac2" format="auto" name="USB Audio Class 2" pack_sdm="1" period_time="100" type="uac2"/>
then uploaded to HQPlayer OS, reboot.
The input page would show the USB Audio Input selection.