Quadraphonic open reel tape or Q4 was the first consumer format for quadraphonic sound recording and playback. Pre-recorded tapes in this format were...

ideally, a quadraphonic system uses four identical speakers. The first machines used for 4-channel sound recording were analog reel-to-reel tape recorders...

manufacture tape recorders. In 1969, TEAC produced the first consumer four-track reel-to-reel tape recorders capable of playing pre-recorded Quadraphonic open reel...

record collectors. Days of Future Passed was issued as a discrete Quadraphonic open-reel tape in 1977. This master was also used for a 2001 dts 5.1 channel...

while keeping background noise to a minimum. 4-track tape also enabled the development of quadraphonic sound, in which each of the four tracks was used to...

tracks on the same reel-to-reel tape was developed. A track was simply a different channel recorded to its own discrete area on the tape whereby their relative...

Quadradisc format. The album was also released on quadraphonic 8-Track tape and Reel-to-reel tape formats. In 1980, the LP was reissued in a two-channel stereo...

new speakers, a PA system, a 28-track mixing desk with a four channel quadraphonic output, and a custom-built lighting rig. Nine tonnes of kit was transported...

of surround sound. It was recorded on phonograph, tape, and a few CDs, and required a quadraphonic player for playback. Surround sound formats became...

Demetris, Jordan (1990-01-01). "The challenge of introducing digital audio tape technology into consumer markets". Technology in Society. 12 (1): 91–100...

films and television commercials. Her career has included works with quadraphonic sound. She has been nominated for a Grammy Award for Best New Age Album...

Realistic and RadioShack model TRC-222 Desk microphone stand with box Open-reel tape box TRS-80 Pocket Computer PC-1 with Realistic Minisette 9 "Company...

1970s using reel-to-reel tape. In 1979, the introduction of the TASCAM Portastudio, which first used the same 1⁄4-inch (6.4 mm) reel-to-reel as quarter-track...

channel quadraphonic version of the album appeared in 1973. This was released on LP using the Quadradisc system. It was also released in quad reel-to-reel and...

7-inch 7.5ips reel to reel tape of a quadraphonic mix of 'Introducing Sparks' which revealed a possible early incarnation of the album. The tape contained...

appeared in 1974 Harrison or Schwann record and tape guides, listing Trilogy in the Quadraphonic 8-track tape cartridge format. Collectors report never seeing...

as SL-22 respectively SL-26 in some markets. RS-1500/1700 series of open-reel tape decks; SA-100/400/600/800/1000 receivers SL-1300, SL-1400, SL-1500,...

announced the first quadraphonic 4-channel 8-track tape cartridges ("Quad-8", later called just Q8). RCA began releasing quadraphonic vinyl recordings in...

demise of quadraphonic, though 8-track tape experienced a temporary boost from the introduction of the Q8 form of 8-track cartridge. Quadraphonic sound returned...

contained in the record groove. This is especially important for playback of quadraphonic recordings. A few specialist laser turntables read the groove optically...

Lafayette was quick to jump on industry trends, first by embracing open reel tape recorders, and later, 8-track cartridge recorders and compact cassette...

the then new four channel quadraphonic technology. In the US, the four channel mix was only available on a quad 8-track tape with some copies marketed...

Aqualung was one of Jethro Tull's albums that were released in quadraphonic sound. The quadraphonic version of "Wind Up", which is in a slightly higher key,...

five hours to unpack and set up, including a 30-channel board discrete quadraphonic public address sound system provided by International Entertainers Service...

surround (left, center, right, surround) Dolby Digital 2/2 – 4-channel quadraphonic (left, right, left surround, right surround) Dolby Digital 3/2 – 5-channel...

re-releases followed. The album was mixed and released in both stereo and quadraphonic. Columbia Records released a 40th Anniversary Edition on March 8, 2011...

the mixes of earlier multi-channel formats (examples include the 1973 quadraphonic mix of Mike Oldfield's Tubular Bells and the 1957 three-channel stereo...

in 1974. He built a special sound room that incorporated the earliest quadraphonic audio systems, and he modified Sony Trinitron televisions for projecting...

term simply means "solid" sound (referring to three-dimensional)—so quadraphonic stereo was used for amplifiers with four channels. 5.1 and 7.1 systems...

Bottom Line with flashlights taped to their microphone stands. July 22 – The first night of The Proms are broadcast in quadraphonic sound by BBC Radio 3 for...