MacBook Pro M1 chip 16 inch

I was able to test my DAC Using an adapter that converts USB plug to a USB C out of the MacBook Pro laptop and it works consistently playing the audio out of the dock unit and not my MacBook Pro speakers. So I’m still wondering why is it not like that with my HDMI cable.

Well an update. Everything works today. HDMI cable works just fine through my AV receiver and it’s not switching back-and-forth between different audio players. I also have my DAC plugged in which works and I also am able to listen through the MacBook Pro speakers. I can easily switch back-and-forth and choose whichever option without there being any glitches. So perhaps it was a glitch I don’t know. But so far pretty happy being a new Mac person. Thanks for all the suggestions.

Well it is happening again. I plug in my HDMI cable and it switches back-and-forth between different output modes. I have no idea what’s going on but it’s pretty frustrating. You would think that this MacBook Pro with the M1 chip would be able to handle this. So there’s obviously a glitch. Does anyone else have this issue or know anything about it or how to correct it? Please let me know.

Thank you

I thought it important To give an update. It appears that it’s the ethernet cable that is causing the lack of consistency with my AV receiver playing through my MacBook Pro. I connected it to Wi-Fi instead of ethernet and it works fine. So it’s either the cable or something.

The last update that I posted wasn’t actually correct.

So I finally figured out why my MacBook Pro laptop kept switching between outputs when I had it plugged into my receiver with an HDMI cable. It turns out sometimes I like to have the roku TV on with no sound which is plugged into my receiver via arc HDMI output. That tweaks the laptop. Solution is to unplug the arc hdmi and have my tv audio not go through my receiver when using my laptop to listen to music. That was a lot of problem-solving.

More like every 15 seconds.