The mixing of the final stems, which, when mixed and replayed represent the film’s finished soundtrack. In a stereo film (or surround-encoded TV programming) it is most common to record the DME stems on three pieces of 4- or 6-track magnetic film, with Dolby-SR noise reduction, or on analog or digital multitrack tape, or onto a digital dubber. These stems, also known as dub masters, are then used to create the print masters, the M&E mix, a mono mix, and possibly an airline version. For a non-surround-encoded stereo mix, then the stems might be in standard stereo format, but this precludes the subsequent production of a 5.1 mix, say for DTV.