For USB devices you would have to use a matching udev rule with vendor and product id for your device, mine looks like this: ATTRS="nf" Note that the topic was about firewire devices. I was pointed to a discussion from January 2014 for a workaround on the PulseAudio mailing list and was able to get my device working.
The device has probably been detected and brought up by ALSA just fine (you can check this be suspending pulseaudio and use the card with aplay and arecord), but doesn't get picked up by PulseAudio because it cannot find a matching profile for your interface (look at the output of pulseaudio -vvvv to find messages of PulseAudio giving up to configure the device after trying for 5 times). Sounds like you face a problem similar to what I had getting the FCA610 to work.
"This sound device does not have any controls"
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