Driver       Mode Flag Subsys - Description (devices)
---------------------------------------------------------------
  null          w     SV W      - null audio driver
  roar          w      V WM L X - RoarAudio driver (devices: localhost, remote.host.dom)
  raw           w    s V WM LRX - RAW driver (devices: /some/file)
  dstr          w    s V WM LRX - VIO DSTR driver (devices: /some/file)
  ao            w      V W      - libao audio driver (devices: DRIVER)
  rsound        w      V W      - RSound (devices: servername)
  dmx           w    s V    L   - DMX512 driver (devices: /dev/dmx)
  pwmled        w    s V    L   - PWM LED driver (devices: /dev/ttyS0)
  sysclock      w      V W      - System Clock Clock Source
  cdriver       w      V W      - RoarAudio Client driver (devices: driver#device)