SMPTE (pronounced "simpty") is an audio feed that contains timing information called "time code". You can configure your 18R2 to accept a SMPTE time code feed (using an RCA audio port) so that it starts and maintains a script in perfect synchronization to an audio feed that also contains music. For example, you can configure your audio feed to send the music on the left channel and SMPTE on the right channel. By sending your left channel to an audio system and your right channel to the 18R2, the audio will play in sync along with your 18R2 firing the script. SMPTE is an alternative to the COBRA Audio Box for synchronizing music for pyromusicals.