On Fri, 2012-10-19 at 11:20 +0900, Amar Akshat wrote: > Hi Tanu, > > I am attaching an output of pactl list, which contains all the sources > and sinks detected when a speaker having 4 identical sound cards was > plugged in. > > Sinks 1 to 5, are the Speaker sinks, > > alsa.card_name = "C-Media USB Headphone Set" > alsa.long_card_name = "C-Media USB Headphone Set at > usb-0000:00:1a.0-1.1.3, full speed" > > card_name is same for all sound cards, and long_card_name includes the > usb address, which again is dependent upon the system. > > Is there some serial number component, like mac-id in network devices, > which is unique for sound cards ? There is supposed to be a serial number that you can query on USB devices, but this is often either not populated or populated the same across devices. This is a long-standing problem to which there unfortunately isn't an easy solution, unfortunately. Cheers, Arun
