See also: equalization, noise reduction, reels & hubs, speeds, synchronization, tape timing, and tape winding

2-channel a high-resolution mastering format. Resources for transfer:  Dreamhire, New York

4-channel was widely used for recording in Europe. Resources for transfer: Sonicraft, New Jersey — Joav Shdema, Israel

4-channel 3M DynaTrack is explained briefly here. While this was a 4-channel system, it used 8 tracks. Resources for transfer: Dale Manquen, California

8-channel was a very popular recording format and also used for sound effects in stage productions. Resources for transfer: Richard L. Hess, Aurora, Ontario — Sonicraft, New Jersey — Dreamhire, New York — Access Audio, California — Joav Shdema, Israel — Ted Kendall, England

12-channel was used for a little while but never gained significant acceptance. Resources for transfer: Sonicraft, New Jersey

16-channel was another music recording format. Resources for transfer: Richard L. Hess, Aurora, Ontario — Sonicraft, New Jersey — Dreamhire, New York — Access Audio, California

24-channel was yet another music recording format but it didn’t seem to gain much traction. Resources for transfer: Sonicraft, New Jersey