* Now not initialized until used.  This means low memory open failure is
  possible.  Check your return values from OpenDevice().  This also means
  audio.device cannot be opened during 2.0 Strap unless InitResident()ed
  first. If OpenDevice() of audio.device fails during strap, you must
  FindResident()/InitResident() audio.device, and then try OpenDevice()
  again. There will be a small memory loss (until reboot) generated by the
  first opener of audio.device or narrator.device (memory used in building
  of audio.device's base).