I thought Blumlein invented a vertical-lateral stereo groove??
-- Tom Fine
----- Original Message -----
From: "Paul Stamler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, April 11, 2013 5:24 PM
Subject: Re: [ARSCLIST] Terrific 1970 Interview with Stokowski
> On 4/11/2013 3:15 PM, Tom Fine wrote:
>> The same expertise required to enable long distance lines of decent
>> audio quality was involved with driving a light valve for optical
>> recording and a recording stylus for electrical disk recording. Not to
>> mention dynamic microphones, loudspeakers and impedence-matching and
>> isolation transformers.
> And the first practical condenser mic, invented by Western Electric's E.
> C. Wente (who also held the patent on the dynamic mic).
> Bell/Western Electric also held patents on the vacuum tube amplifier
> (not the tube itself, but its use as an amplifier), the transistor, an
> early limiter circuit, L-C-R mic placement for stereo recording, and, as
> noted by others, the 45/45 stereo groove, independently developed by
> Alan Blumlein. Nyquist, who was one of several people who developed the
> sampling theorem that's the basis of PCM recording, was a Bell Labs
> engineer. Johnson, who invented Johnson noise, was too. And the list
> goes on.