Alsa found the card, and the front speakers work, but the rear speakers
don't. I'm using Alsa 1.0.5. I checked the Turtle Beach webpage, and
they directed me to the OpenSound page, but I can't find any info. I
have the sound volume set to 100 and unmuted, and every other volume
settings at 100 and unmuted in alsamixer. Does anyone know how to get
them to work?