also with out, measured or sized up; fully ascertained (cf. senses 2b 5).

Recorded by a phonograph. Cf. phonograph, v. 2.

Of, relating to, or designating gramophone recordings made using sound waves collected in a horn to drive a cutting stylus, rather than a…

= acoustic, adj. 5a.

Giving the impression of a spatial distribution in reproduced sound; spec. employing two or more channels of transmission and reproduction so…

Of sound recording and reproduction: involving only one channel, so that there is one output signal and the sound seems to come from a single source…

= multitrack, adj.

Applied to a system of sound reproduction that uses two separated microphones and two transmission channels to achieve a stereophonic effect; esp.…

Sound Recording. Involving or comprising two or more soundtracks, esp. ones separately recorded for subsequent mixing.

made or recorded using a telediphone.

= stereophonic, adj.

recorded from several magnetic tapes played simultaneously.

Of sound recording and reproduction: = monaural, adj. 2.

= monophonic, adj. 3.

= multitrack, adj. rare.

†(a) = quarter course n. (obsolete); (b) a soundtrack recorded on one quarter of the width of a magnetic tape, resulting in four parallel tracks…

A proprietary name used attributively and absol. to designate electronic noise-reduction systems employed esp. in tape recording to reduce hiss.

Designating a system of sound recording and reproduction that employs four signal sources, two or more channels, and four loudspeakers, these being…

applied to certain forms of quadraphonic recording and reproduction (see quots.).

Of sound reproduction: involving speakers at different heights so as to add a vertical distribution of sound to the horizontal one of stereophony.

= quadraphonic, adj.

= quadraphonic, adj.

proprietary terms in Britain and the U.S. respectively applied to equipment fitted, and recordings made, with the Dolby system.

(the designation of) a particular system of quadraphonic recording and reproduction.

Mixed beforehand, premixed. Also: of or relating to premixing.

= quadraphonic, adj.