[alsa-devel] Audinst HUD-mx2 covertly muting itself

[Clemens Ladisch]

Tobias Klausmann wrote:
> While the device works right in principle, every time an app
> closes the device, it mutes itself (or crash, this may be a Hw
> problem). There is no indication of the broken state in the mixer
> displays of alsamixer or alsamixer-gui, and amixer output does
> not indicate any change, either (see below).

The USB Audio Specification defines a mechanism with which a device
could notify the PC of changes in mixer controls.  However, this device
does not have such a mechanism, so this looks like a firmware bug.

Does this happen for both the analog and digital outputs?

> The vendor does not officially support anything but Windows

Does it work correctly in Windows without any vendor-supplied driver?


Regards,
Clemens