Using the ET Midi/SMPTE Hardware on either a Playback Controller or Ethernet Node you can receive or generate any flavour of SMPTE, MIDI T/C, MIDI notes and/or MIDI Show Control.  Using your PC's CD player, you can play audio tracks and synchronize your light cues to the time stamp burned on the CD. Using Internal SMPTE without an interface you can do "Learn Timing" on a cue list and program a single button to playback your show faithfully each time.