Abbreviation for Linear Time Code. Some references refer to it as Longitudinal Time Code to make a clear distinction between it and VITC (Vertical Interval Time Code), which is normally used in video. LTC is Time Code that is written sequentially along the length of a piece of analog tape or on the linear audio track on some video tapes. It is the most common method of deploying time code. Nowadays LTC can usually be generated from subcode or other proprietary information on digital tape or hard disk units, but it is still referred to as LTC because it appears as standard linear time code at the output of those devices.