Pro Tools tracks are where audio, MIDI, video, and automation data are recorded and edited. Pro Tools tracks also provide audio channels for routing internal busses, and physical inputs and outputs for audio and MIDI.
Pro Tools provides multiple types of tracks: audio, Auxiliary Input, Master Fader, VCA Master, MIDI, Instrument, video, and click.
Audio, MIDI, Instrument, and video track data can be edited into clips or repeated in different locations to create loops, re-arrange sections or entire songs, or to assemble tracks using material from multiple takes.
Auxiliary Input tracks can route internal audio busses or physical inputs to internal busses or physical outputs. Auxiliary Inputs are typically used for audio effects busses, audio throughput (monitoring), and submixing.
Master Fader tracks provide controls for physical audio output channels, including the volume level of your mix, panning, and plug-in inserts.
VCA Master tracks (Pro Tools HD and Pro Tools with Complete Production Toolkit only) provide control of tracks in a Mix Group that has been assigned to the VCA Master.
Video tracks support QuickTime movies (all Pro Tools systems) and VC-1 video files (Windows 7 only). Additionally, Pro Tools supports Avid video when using a supported Avid video peripheral. An individual video track can play back only one type of video at a time.
Audio, Auxiliary Input, Master Fader, and Instrument tracks can be mono, stereo, or multichannel (Pro Tools HD and Pro Tools with Complete Production Toolkit only). When creating a new track, select from the list of channel formats supported by your system.
Pro Tools also lets you create a Click track so you can record while listening to a click. Click tracks can use the TL Metro plug-in (included with Pro Tools) or a MIDI instrument.