cat /proc/asound/FCA610/usbmixer
USB Mixer: usb_id=0x13970003, ctrlif=0, ctlerr=0
Card: BEHRINGER FCA610 at usb-0000:00:14.0-2, high speed
Unit: 211
Control: name="Clock Selector", index=0
Info: id=211, control=1, cmask=0x0, channels=1, type="U8"
Volume: min=1, max=3, dBmin=0, dBmax=0
I currently use Ubuntu 14.04 (Kernel 3.13) and already submitted a bug report[2] on Launchpad with more information some months ago, but it didn't get much attention. I have also recently installed and tried the device with Fedora Heisenbug, with the same result.
I recently found out that some users can successfully use this device (and the bigger FCA1616) with JACK on Debian[3]. So the device seems to be supported by the drivers, but may need some additional configuration bits to be added, so that ALSA can present controls for the input and output channels in alsamixer and PulseAudio in turn would be able to pick it up and create another audio sink.
I'm looking forward to provide you all the information you need.
With kind regards, Benjamin
1: http://www.behringer.com/EN/Products/FCA610.aspx
2: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1198577
3: http://www.musiker-board.de/reviews-tests-rec/552010-review-interface-behringer-firepower-fca610.html#post6798617
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