Columbia used to do this after CBS took over in 1939, but their sessions
were done to two 33 1/3 rpm masters, one to dub to the conventional 78
release and one to file away for when the long-playing record was available
to the consumer market. But there was a period in the 1940s when Victor ran
two lathes simultaneously (resulting in takes that end in -A); whether that
was a failsafe in case something happened to the main master, or if it was
for matrix/mother/stamper plating for foreign markets, isn't clear.

This film dates from 1937, and the session is for Irving Mills' Master
Records, Inc; I believe Mills used the ARC/Brunswick studios at 1776
Broadway in New York at the time, but I could be wrong.

Michael Shoshani

On Thu, Aug 4, 2016 at 8:42 AM, Carl Pultz <[log in to unmask]> wrote:

> They cut two lacquers simultaneously. I'd only heard of that done by
> Capital
> in the LP era.
> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of Aaron Coe
> Sent: Wednesday, August 03, 2016 9:34 PM
> To: [log in to unmask]
> Subject: [ARSCLIST] Video: Record Making with Duke Ellington and his
> Orchestra (1937)
> From the Dust-to-Digital Facebook page:
> -Aaron
> _____________________