Indeed, I was looking this up for a different reason; not an answer to your
question, but a related format:
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 ;) ...
> 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
> 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:
> -- 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:
>> 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