I can't get 5.1 to output over USB-C to HDMI on Macbook Air M1 2020
I am trying to get my macbook to output 5.1 sound thru my AVR > TV set-up. When I plug in, the mac and AVR only see 2.0 being output. I am using a USB-C > HDMI cable that supports 5.1 (allegedly) [https://www.amazon.com/gp/product/B09QC76JQW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1].
What am I doing wrong, and how can I fix this? I have set it to "HDMI" in "Sound" and have opened the "Audio MIDI Set-up" and everything only shows "stereo". I have no options for 5.1, or anything else, besides choosing the bit rate in stereo.
My set-up plays my PS4 in 5.1 no problems. ARC is being used. Is this a handshake between my mac and AVR? Is it even possible to output 5.1 thru the display port USB-C connection?
I am using the macbook m1 2020 > usb C > HDMI cable > yamaha rxv381 avr > sony TV.
Please advise! Thanks.
MacBook Air 13″