Unable to play music in car using Roon ARC (ref#GQTGHC)

[connor]

Thanks for the update @tahsu, we’re certainly sorry to hear the pattern has regressed.

Just to clarify, these are your specific steps:

1. You open ARC and then enter your car.
2. You connect to your 2013 C250 AMG Sport (Mercedes) audio system with Bluetooth
3. No audio plays through the car speakers, but ARC displays that audio is playing

We want to test for two things. First, we need to see whether ARC is delivering audio via Bluetooth focus with Android, or if it just thinks it is. Second, we need to test whether there’s a bit-depth or sample-rate disagreement that might be causing problems.

To test the first, please try this on the Pixel 8, if possible. We may have taken this step previously, but it’s worth testing on the new build:

Go to: Settings → Developer Options → Enable “Disable Absolute Volume” and also try toggling: Settings → Developer Options → Bluetooth Audio Codec (switch to SBC manually)

Next, try disabling Exclusive Mode in ARC, if you’ve had that enabled. Try toggling a few different quality settings in the ARC settings page (bandwidth optimized, etc.). and also try a few different tracks at different sample rates and bit-depths.

Let us know if you experience any changes. We’ll be collecting logs on the backend. Thank you!

[tahsu]

@connor

Just to clarify, these are your specific steps:

1. You open ARC and then enter your car.
2. You connect to your 2013 C250 AMG Sport (Mercedes) audio system with Bluetooth
3. No audio plays through the car speakers, but ARC displays that audio is playing

When I do the above, I have had two different things happen. Music has played twice in this scenario in the car, the many others times it is as you describe above.

@connor

Go to: Settings → Developer Options → Enable “Disable Absolute Volume”

I could enable developer options and disable absolute volume, but I could not see any difference.

@connor

Settings → Developer Options → Bluetooth Audio Codec

This is visible but greyed out, so I cannot change it.

@connor

Next, try disabling Exclusive Mode in ARC, if you’ve had that enabled

I have not changed this, how do I select it?

@connor

Try toggling a few different quality settings in the ARC settings page (bandwidth optimized, etc.). and also try a few different tracks at different sample rates and bit-depths.

I tried different sample rates and bit-depts, bandwidth optimised, full quality. No difference.

I tried qobuz app after, and it played fine. I could switch to antenna pod, and it played fine, I could then switch between the two, no problem. When I try ARC, the same issue, the phone shows as playing but no sound from car.

[benjamin]

Thanks for the update @tahsu! We’ve shared your additional information with our development team, who will need to investigate your case further.

We’ll follow up with additional troubleshooting steps once they’ve had time to review your case. Thanks for your patience in the meantime!