JAPANESE promo 4-Channel Demonstration Record UD-4 quadraphonic sound Japan
£
43
$
57
£ 43
Sold For
Apr 1, 2021
Sold Date
Mar 25, 2021
Start Date
£ 20
Start price
7
Number Of Bids
Great Britain
Country Of Seller
eBay
Auctioned at
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Description
JAPANESE promo 4-Channel Demonstration Record UD-4 quadraphonic sound Japan
Various ?– 4-Channel Demonstration Record
Label:
DENON/Nippon Columbia, Japan ?– ST-5003
Format:
Vinyl, LP, Album, Stereo
Country:
Japan
Released:
Genre:
Jazz, Classical, Stage & Screen
Style:
Tracklist
A1 An Explanation Of UD 4 System / Ben Hur / Farandle
A2 Hawaiian Wedding Song
A3 The Kilimanjaro Tune
A4 Killing Me Softly With His Song
B1 How To Adjust Seperation For Demodulator
B2 It Never Rains In Southern California
B3 The Maltese Melody
B4 Close To You
UD-4 was a discrete four-channel quadraphonic sound system for phonograph records introduced by Nippon Columbia (Denon) in 1974. This system had some similarities with the more successful CD-4 process introduced by JVC and RCA in 1972. Only about 35 to 40 LP album titles were encoded in this format, and it was marketed only in the UK, Europe and Japan. Most of these releases were marketed by the Denon label. The UMX standard used for UD-4 contains two subsystems, BMX, a basic 4-2-4 matrix decoder (different from QS Regular Matrix), and QMX, a 4-4-4 system. UD-4 is the process of modulating QMX onto a record with a process similar to CD-4, but also matrix encoded. A BMX decoder could be used to play back UD-4 recordings, but, by adding a special phono cartridge and a specialized UD-4 demodulator, two supplementary channels could be extracted and used to enhance directional resolution. UD-4 systems first encoded the four original channels into four new channels. Two of these new channels contained the original four channels, matrix encoded. The other two contained only band-limited localization information, and were encoded with high frequency carrier signals similar to the CD-4 system. The system suffered from incompatibility with regular stereo playback due to phase differences between the left and right channels.[1] Phono cartridge set-up for UD-4 playback was less critical than in CD-4, because the high frequency carrier signals were not as high as those found in the CD-4 system.[********************************************************
Visual Grading
- Vinyl - VG+
- Sleeve - VG+
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