Editing Ampex (section)

==Professional 8-track recorders==
{{main|History of multitrack recording}}
Ampex built a handful of multitrack machines during the late 1950s that could record as many as eight tracks on {{convert|1|in||adj=on}} tape. The project was overseen by Ross Snyder, Ampex manager of special products. To make the multitrack recorder work, Snyder invented the [[Sel-Sync]] process, which used some tracks on the head for playback and other tracks on the head for recording. This made the newly recorded material be in sync with the existing recorded tracks.<ref>{{cite web|url=http://mixonline.com/mag/audio_ampex_selsync/|archive-url=https://web.archive.org/web/20100131104600/http://mixonline.com/mag/audio_ampex_selsync/|url-status=dead|title=Ampex Sel-Sync, 1955|archive-date=January 31, 2010}}</ref> The first of these machines cost $10,000 and was installed in [[Les Paul]]'s [[home recording]] studio by [[David Sarser]].<ref>{{cite web|url=http://www.reevesaudio.com/studiothree.html|title=Studio 3; A Place Of Recording History|access-date=22 November 2016}}</ref><ref>{{cite web|url=http://www.aes.org/aeshc/docs/sel-sync/snyder_sel-sync.pdf|title=ARSC Journal, Sel-sync and the "Octopus": How Came to be the First Recorder to Minimize Successive Copying in Overdubs|access-date=August 13, 2009|archive-date=May 19, 2011|archive-url=https://web.archive.org/web/20110519105331/http://www.aes.org/aeshc/docs/sel-sync/snyder_sel-sync.pdf|url-status=dead}}</ref>

In 1967, Ampex responded to demand by stepping up production of their 8-track machines with the production model MM 1000. Like earlier 8-track machines of this era, it used 1-inch tape.