The optional Audio and KeyKode Reader lets you capture high quality audio along with KeyKode information from the film. The reader features a magnetic audio head or deep red LED illumination with advanced optics, electro formed slits, and precision mechanical adjustments for azimuth, zenith and yaw to give you the best possible audio capture with incredible high frequency response. The reader also features a precision capstan and encoder that allows for automatic correction of wow and flutter, allowing you to accurately capture audio, even when the scanner speed changes! The KeyKode Reader provides you with unique identification numbers for each film frame so they can be easily correlated with the corresponding video timecode. Installation is easy and all you need to do is bolt the reader onto the front of the chassis and it will automatically be detected.