I bought this USB soundcard. I have this powered USB hub and I plugged the soundcard to the hub(the 2 usb ports in the pi are used by wifi dongle and usb hub). I changed the configs , and rebooted and the led on the soundcard lit up. amixer gave proper results.
Everything was fine except when I start playing anything using aplay, there is audio output for a few seconds and then the led goes off and it loses the device. A reboot doesn't even fix it. I have to power down and power up for the card to be detected again. What might be the problem?