> as lemmas
pseudoquadraphony
pseudoquadraphony n. 
/ˌs(j)uːdə(ʊ)kwɒˈdrɒfn̩i/, /ˌs(j)uːdə(ʊ)ˈkwɒdrəˌfɒni/,
Brit. /ˌs(j)uːdə(ʊ)kwɒˈdrɒfəni/
, /ˌs(j)uːdə(ʊ)kwɒˈdrɒfəni//ˌs(j)uːdə(ʊ)kwɒˈdrɒfn̩i//ˌs(j)uːdə(ʊ)ˈkwɒdrəˌfɒni/U.S. /ˌsudoʊˌkwɑˈdrɑfəni/
(also pseudoquadrophony) Acoustics (now rare) sound reproduction in which signals from two sources are fed to four speakers in such a way as to give a partial effect of quadraphony./ˌsudoʊˌkwɑˈdrɑfəni/ΘΚΠ
society > communication > record > recording or reproducing sound or visual material > sound recording and reproduction > [noun] > systems of
phonography1861
wire recording1933
stereophony1950
half-track1956
stereo1956
stereophonics1958
lip-synchronization1959
mono1959
monophony1959
pretaping1959
over-recording1961
Dolby1966
quadraphonics1968
quadraphony1969
surround sound1969
periphony1970
quad1971
multitrack1972
quadraphonic1972
quadro1972
pseudoquadraphony1975
multitracking1977
vertical recording1982
bitstream1989
1975 G. J. King Audio Handbk. 2 Pseudo-quadraphony..is designated 2–2–4, which implies that the four loudspeakers obtain their signals from the two-channel source.
1976 Which? May 99/3 There is a sort of ‘fake’ quad called..ambiophony, or pseudoquadrophony. With this system, you can derive some quadrophonic effect from ordinary stereo recordings and broadcasts.
<
as lemmas