Hi Bob - thanks so much for the response. Yes, it's an M1 Mac mini (brand new) - I changed all of the formats to 48k and that at least gets me playing. Any reason why the M1 hdmis can't do multichannel? When I play a 6 channel SACD iso - it shows the source as 2 channel in JRiver. Another setting I'm missing perhaps?
I don't know that I've tried multichannel through the HDMI interface on the M1. It does work on the Intel Macs.
I'll try it if I get time in the next day or so.
You should try using the actual device in MC's audio device settings (instead of core audio).
Also in MC's DSP studio Output Format where you've chosen to send everything as 48k, your "Channels" should be set to "Source Number Of Channels"
If that doesn't work and the output device supports Dolby you could select Dolby in Output format.
I'd suggest setting the resampler to SoX under audio settings and using the following for track transitions: