Trust in Alsa

The Trust SC-5500p usb sound box isn't picked up by ALSA directly (audacious seems to work?) - the result is bad distorted/garbled sound. ALSA configuration is more complicated than most need.

Adding an asoundrc with channels 6 seems to get sound out at least (no dmix/mixing yet):

pcm.!default complex_convert

pcm_slave.sl3 {
   pcm "hw:0,0"
   channels 6
}
pcm.complex_convert {
   type plug
   slave sl3
}