With the appearance of Pro Tools and other computer-based DAWs, as well as hard disk-based systems such as RADAR, many of these formats are now obsolete—or at least discontinued—but that doesn’t stop thousands of studios from continuing to use them to record a lot of great music.
2-inch The standard size of 24-track analog recorder tape.
1-inch Used on some current and older analog 16-track machines, such as the Otari MX-80. Also, the standard 8-track format of the late ‘60s and early ‘70s.
½-inch Used on analog 4-track recorders as a master for film and video mixes. Also occasionally used as a wide, 30ips 2-track master for record mixes.
¼-inch A standard analog 2-track master mix format.