quadraphonic

The Who tried quadraphonic sound on _Quadrapenia_, as did a few others back in the day.

Wonderful perfect quadraphonic sound with distortion levels so low as to make a brave man weep.

Other people's high-quality eight-track tape decks, quadraphonic amplifiers, and laserdisc systems are also working fine.

My generation has been cabling shit together for decades, from stereos to VCR's to DVD's to quadraphonic sound systems to DVR's.

Does anyone have a similar visual reference for how quadraphonic records work?

It's important to realize that IBM didn't see the potential of personal computers -- they thought they would be another passing fad like quadraphonic sound.

All of the popular quadraphonic formats work modulating or encoding the four channels together into two signals which are cut just like a stereo record.

No doubt it had a superlative quadraphonic sound system installed.

I had a similar experience once with a quadraphonic receiver from the 70s.

I played a concert with a violinist recently, where I was live coding audio effects for each string independently via a quadraphonic pickup.

I remember my dad's Akai player from the 50s even supported quadraphonic.

I guess this also lets Apple sidestep a bunch of fuss around non-stereo use-cases, for people who want quadraphonic or 5.1 at their workstation.

This was originally billed as "The Pink Floyd Movie" and was only in selected movie theaters, because there had to be facilities to accomodate the Quadraphonic surround sound concert speaker system that toured with it.

Quadraphonic CD-4 records from the 1970's encode 4 discrete channels into a single record groove!

Quadraphonic has 2 more channel 'encoded' in a high frequency carrier (50 kHz maybe) which can't be heard on regular mono or stereo equipment.