I recently acquired an Audinst HUD-mx2. Most usb DAC in this price range are plug-and-play and use VIA, and his little brother, the HUD-mx1, is plug-and-play too, so I expected it to bee. But it's not really the case.
I mean it's correctly recognized by the system, appeared in Parameters -> Sound or pavucontrol and when playing a song (or any other sound from any other application), the indicator turns to green, meaning the device is active and receives a well PCM signal. But no sound comes from my headphones ...
I downloaded Live-USB of Ubuntu 12.10 and Fedora 18 and tried on an other PC running LinuxMint 13 Maya, and the problem is exactly the same. It's works fine on Windows 7
Here are some technicals (or not) informations :
I'm under LinuxMint 14 Nadia 64bits, cinnamon Edition. I use pulseaudio and Decibel Audio Player (but the result is the same with vlc or when playing video on youtube).
The Windows 7 is 32bits.
The HUD-mx2 uses a VIA Vinyl EnvyUSB 2.0 Audio Controller which is recognized by the kernel :
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$ dmesg | grep VIA
[ 1469.854456] usb 3-1: Manufacturer: VIA Technologies Inc.
[ 1470.064407] input: VIA Technologies Inc. Audinst HUD-mx2 as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1:1.2/input/input10
[ 1470.064597] hid-generic 0003:040D:340F.0001: input,hidraw0: USB HID v1.00 Device [VIA Technologies Inc. Audinst HUD-mx2] on usb-0000:00:14.0-1/input2
When playing a song, the device is pretended to be correctly used :
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$ ls /proc/asound/
card0 cards HUDmx2 modules PCH seq version
card1 devices hwdep oss pcm timers
$ ls /proc/asound/HUDmx2
id pcm0p pcm1p stream0 stream1 usbbus usbid usbmixer
$ cat /proc/asound/HUDmx2/stream0
VIA Technologies Inc. Audinst HUD-mx2 at usb-0000:00:14.0-1, full speed : USB Audio
Interface = 1
Altset = 1
Packet Size = 192
Momentary freq = 44100 Hz (0x2c.199a)
Endpoint: 1 OUT (ADAPTIVE)
Rates: 44100, 48000
I also mention that I tried my father's VDAC II and a NuForce Icon 2 and they both work fine, on LinuxMint 13, 14 and Windows 7.
I don't know what other information I should give. If you need, please ask.
Thanks a lot for helping me
[EDIT : changed the title in a more informative way]