I am using plantronics USB headset connected to a laptop with Ubuntu Hardy installed. I can play audio through USB headset using totem movie player after it was changed in System > Preferences > Sound. The problem is Mozilla Firefox is not playing audio through USB headset. Firefox can play audio through the laptop speakers but the sound sucks.

To fix this problem, we need to tell alsa to set the USB headset as the default sound card.

Here are the list of the sound cards present in the system.  full story »