Symfonium ignores preamplification and volume settings when using DACs

Support
1

Issue description:

Hello!
I am using Symfonium 13.1.0b on a Pixel 7 Pro with Android 15. When using a USB-C DAC (or headphones with an integrated DAC), the volume is always very loud, even when using the minimum volume allowed by the system. In order to fix it, I set the preamplification to -15 dB. However, this often does not work as moving the slider around yields no effect whatsoever. Disabling the DSP makes the DAC output to maximum volume, irrespective of what the volume actually is set to (which means it’s often loud to the point it’s painful: not great!).
In order to fix it, I often have to unplug the DAC, re-plug it in, enable the DSP, close Symfonium and re-open it. After that, preamplification appears to work as moving the slider around actually changes the volume output.
Other players, such as HiBy Player, do not exhibit this behaviour, so I doubt that this is a system-wide issue and not some quirk in how Symfonium manages USB DACs - hence this bug report.

Logs:

Upload description: Slater91

Additional information:

 

 

Reproduction steps:

 

  • Plug in a USB-C DAC (e.g. Moondrop Echo) or DAC-equipped headphones (e.g. Hidizs ST2 Pro Nebula)
  • Open Symfonium
  • Start reproducing music
     

Media provider:

Subsonic

Screenshots:

     

2

Symfonium does not handle USB DACs at all and the DSP is also delegated to the OS.

On the contrary hiby does have specific stuff and also request USB exclusive access that will probably interfer with the OS.

Be sure that no other app request exclusive USB access.

3

HiBy requires USB exclusive access when I connect the DAC, but I refuse it. No other pop-up appears.

4

The only workaround would be on playback advanced settings restart player on device change.

This is usually more a Samsung workaround but maybe it will work your DAC.

5

Unfortunately I cannot find that setting in my app under the “advanced settings” section. I only have debug, PIN code, metered Wi-Fi as mobile, various “clear” and analytics settings. No “restart player on device change”.

EDIT: obviously I found it right after posting this. It’s under Playback → Advanced settings. I’ll test it and see if it makes a difference. In the meantime, thanks!