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Quadraphonic records (LPs to you and me)

If normal analogue comes through as 2 channel, what effect does a quadraphonic record have?
If my processor (Bryston sp3) codes 2 channel into surround 7.1 - which it does exceedingly well- does that make the separation easier?
(Bryston do not know)
Thanks chaps and chapesses
tatyana69

Showing 5 responses by cleeds

cleeds
6,072 posts
 
tatyana69
Ok but a proper decoder is what ...?
You'd need a decoder designed for the format you’re trying to decode, such as a JVC CD-4-50 for the CD-4 format. Or something like a Sansui QSD-1 for QS-encoded LPs.
cleeds
6,072 posts
 
akg_ca
You need a proper real Quad receiver, whether is was SQ formate or the synthesized stereo-based format QS format.

This is mistaken. There’s no reason to confine yourself to a "quad receiver" to reproduce quad. You just need a proper decoder - these were available as outboard devices.

... or the synthesized stereo-based format QS format ...
QS quad was no more "synthesized" than SQ quad. It was four channels matrixed to a two-channel format.
cleeds
6,072 posts
 
tatyana69
So the quadraphonic lps need a special cartridge ... and phonostage then. So presumably playing with a normal cartridge and phonostage some channels are missing, hence maybe a weaker sound for a number of reasons, presumably, from what you are saying?
No, all of the quad LP formats were compatible with two channel playback, at least as far as I can recall.

I am looking at Ebay uk an item called
CARLY SIMON ~ HOTCAKES ~ USA QUADRAPHONIC STEREO AUDIOPHILE LP
So the "stereo" word is out of place, or indeed wrong?
No, it's not wrong at all. Quadraphonic is a type of "stereo," just as two channel is a type of stereo. "Stereo" is not confined to two channels.
cleeds
6,072 posts
 
chakster
Quadraphonic Records (Descrete-4 or CD-4) require special cartridge and special processor, also 4 speakers
CD-4 was only one of the quad LP formats, although I think it may have been the only discrete format for LP.  SQ and QS were competing formats to put quadraphonic audio on LP.
cleeds
6,072 posts
 
tatyana69
If normal analogue comes through as 2 channel, what effect does a quadraphonic record have?
It isn’t clear what you mean by "normal analog." Analog can be any number of channels. Two-channel stereo is just one configuration.

In any event, a quadraphonic record can store four channels, which you can feed to a quadraphonic system using a proper phono cartridge and phono preamplifier.
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