[78-L] Binaural, duophonic, etc.

[Jeff Sultanof]

I specifically remember having "Cinderfella," a Dot stereo album ca. 1960
that was cut with a Fairchild lathe. Don't remember the model number.

Funny thing about the Minter stereo system. When CD-4 records were mastered,
they had to be cut at half speed to get all the information in the groove.
It was the precursor of the whole half-speed mastering technique for
standard stereo LP albums. But the masters had to be cut carefully and the
vinyl had to be top grade. The Japanese CD-4 albums I had played
beautifully; there was even a quad version of the soundtrack album of "Jaws"
that was incredible. But I had an Anthony Braxton Arista CD-4 album that had
a lot of problems where the modulatory tone simply dropped out and the back
channels cut out. Too much information and too little space I guess.

Jeff Sultanof

On Thu, Apr 21, 2011 at 8:07 PM, Royal Pemberton <ampex354 at gmail.com> wrote:

> And wasn't Fairchild's 641 (I think that's the model) stereo cutter built
> on
> a lateral/vertical design, although with proper treatment of signals, would
> produce stereo discs suited for 45/45 stereo playback?
>
> I remember seeing an article in either Radio-Electronics or Radio & TV News
> circa 1957 that explained a compatible stereo cutting system designed by
> Jerry Minter of Components Corporation whose record masters could be cut
> with an ordinary lateral mono cutter; it was in a sense a precursor of the
> technique behind CD-4 quad records in that the sum signal was cut in the
> conventional manner whilst the difference signal was FM modulated with an
> ultrasonic signal.  High quality wideband pickups and preamps were required
> to recover all the information from the records and reconstruct proper left
> and right channels.
>
>