I am trying to configure forked-daapd on my computer, and everything goes well except that in configuration file I can not set a new value for the line corresponding to soundcard. This is the default code in the config file:

#card = "default"

I want to use a soundcard called "DG2", which is the soundcard no.1 and has a first device that ALSA recognizes as no.0. So, I change the line to the following:

card = "hw:DG2,0"

I restart the daapd service and the next time I play a file through iTune remote, I get a message in my server log file saying that it can not play the file because the device is busy. Any change in the device name will return a different error, saying that the device does not exist. I am pretty sure no other uses this external device, and I don't understand why I get this message. I have tried hwplug as well, with no result.