Indeed, I was looking this up for a different reason; not an answer to your question, but a related format: http://en.wikipedia.org/wiki/Auricon Dave Lewis Lebanon, OH On Thu, Feb 9, 2012 at 8:37 AM, Tom Fine <[log in to unmask]>wrote: > I think I found most of my answer, in an obvious place ;) ... > > http://www.aes.org/aeshc/docs/**smpte/movie.sound/kellogg-**history3.pdf<http://www.aes.org/aeshc/docs/smpte/movie.sound/kellogg-history3.pdf> > see page 432 onward. > > Summary: SMPE meets to discuss magnetic recording right after WWII; in > 1947, DuPont develops mag-coated film and RCA develops a retrofit kit for > one of their 35mm optical recorders; by 1951, RCA had developed 1, 2 and > 3-track magnetic-film recorders and Columbia Pictures was using that > equipment (and then printing to optical for editing!). Also in 1951, > Westrex reported developing magnetic recorders for various track layouts > and various film widths. The SMPE Progress Report of 1952 reports that by > the end of 1951, "approximately 75% of the original production recording, > music scoring and dubbing in Hollywood was being done on magnetic-recording > equipment." > > Kellogg, always worth checking for the history of anything > sound-for-picture up to the mid-50's! The full article is linked from here: > http://www.aes.org/aeshc/docs/**smpte/movie.sound/audio_** > engineering_in_motion_**pictures.html<http://www.aes.org/aeshc/docs/smpte/movie.sound/audio_engineering_in_motion_pictures.html> > > -- Tom Fine > > ----- Original Message ----- From: "Tom Fine" <[log in to unmask] > > > To: <[log in to unmask]> > Sent: Thursday, February 09, 2012 8:15 AM > Subject: [ARSCLIST] Early 35mm magnetic film history in Hollywood > > > > Hello ARSC brain trust: >> >> Does someone know exactly when folks in Hollywood started using >> magnetic-coated film in their sound recordings? I found this article from a >> Dolby executive: >> http://www.**cinematechnologymagazine.com/**pdf/dion%20sound.pdf<http://www.cinematechnologymagazine.com/pdf/dion%20sound.pdf> >> which seems to put the date around 1952, with the development of >> Cinerama, which apparently used stripe-coated magnetic tracks. I think >> Westrex developed its stripe-coat and full-coat recorders around that same >> time, and that magnetic recording of master tracks started to become common >> as the various widescreen formats developed in the early 1950's. Is this >> historically correct? >> >> Thanks in advance for your input. >> >> -- Tom Fine >> >