Audio Device, 13
  AbortIO(), 18
  additional information, 34
  BeginIO(), 18
  changing the volume, 26
  channel, 14
  CloseDevice(), 18
  closing, 18
  CMD_FLUSH, 27
  CMD_READ, 27
  CMD_RESET, 27
  CMD_START, 27
  CMD_STOP, 27
  CMD_WRITE, 25
  commands and functions, 15
  definitions, 14
  device interface, 16
  double-buffering, 26
  free, 17
  hardware control commands, 25
  IORequest block, 16
  IORequest structures, 16
  lock, 17
  opening, 16
  playing a sound, 25
  precedence of users, 22
  precedence, 17
  reserve, 17
  sample, 14
  scope of commands, 17
  simple audio example, 18
  starting a sound, 27
  steal channel, 22
  stopping a sound, 26, 27
  Wait(), 18
  WaitPort(), 18