On 8/30/2014 11:44 AM, Tom Fine wrote:
> I think it's a stretch to say that Blumlein alone "invented" 45/45
> stereo cutting. Keller et al have US patents on it and Bell Labs
> successfully used it to make experimental recordings in the 1930s, among
> them with Stokowski/Philadelphia. As I understand it, those were 45/45
> and not vertical-lateral stereo recordings.
On that, I need to do more research. I had read that Keller et al used
vertical/lateral recording, and also tried two synchronized discs (which
didn't work too well) and dual grooves on one disc (a la Emory Cook).
When Westrex (Bell) introduced 45/45 cutting in the 1950s, apparently
EMI gave a discrete "Ahem" because of Blumlein's previous work.
> I do agree with your point about stereo mic'ing. Blumlein and Bell Labs
> came up with different approaches, and in fact Bell Labs experiements
> ended up favoring 3-channel stereophony as a more realistic reproduction
> of an orchestral sound source. The M-S and other crossed-matrix
> techniques were very firmly entrenched in Europe, to the point that
> people couldn't believe that 3 spaced omni's actually worked as well as
> they did for Mercury. Then a Philips engineering team tried the same
> technique in the mid-60's and got a series of very good-sounding
> recordings (somewhat un-Philips-like because they were both intimate and
> reverberant and not either-or).
> As for 45-45, as I understand it, the whole reason Westrex could charge
> a license fee for all stereo cuts, in the 60s and I think into the 70s,
> was because they inherited the WECO patents from Keller et al from the
> 30s. Again, if Blumlein had exclusively "invented" 45/45, Bell Labs
> wouldn't have been granted a U.S. patent.
I need to dig deeper into this.