This will create a new track when silence is detected on the analog or digital input. If you are in analog mode, you will have the option of setting the threshold of silence. If in digital mode, this is not applicable. If you are recording from a DAT that supports sending Start IDs, it will grab this information from the DAT and start tracks when the Start ID says to, but if you are recording from another CD player, it will go by the silence between tracks.