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Publication of BE767694ApublicationCriticalpatent/BE767694A/xx
H04S3/00—Systems employing more than two channels, e.g. quadraphonic
H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
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BE767694A1970-05-261971-05-26Appareil de reproduction de quatre canaux d'information enregistres surun support a deux pistes
BE767694A
(fr)