For all formats on this page, also please look at the Noise Reduction page.
2-channel a high-resolution mastering format.
4-channel was widely used for recording in Europe.
4-channel 3M DynaTrack is explained briefly here. While this was a 4-channel system, it used 8 tracks.
8-channel was a very popular recording format and also used for sound effects in stage productions.
12-channel was used for a little while but never gained significant acceptance.
For the following two formats, please see the discussion on the Equalization page there are similar concerns as for the 1/2-inch 8-track format.
16-channel was another music recording format.
24-channel was yet another music recording format but it didn’t seem to gain much traction.
See also: equalization, noise reduction, reels & hubs, speeds, synchronization, tape timing, tape winding, and track configurations.