One of possibly several audio tracks in an audio file. Stereo files have two channels, 1 (Left) and 2 (Right). Some file formats support additional channels to contain extra audio data. For example, the MixPre-3 can record the L/R Stereo mix to Channels 1, 2 in the WAV file and ISO (isolated) channels 1, 2, 3 recorded on channels (or tracks) 3, 4, 5 respectively.