condenser microphone, quadraphonic, tympanic, aural, binaural, sonic, monophonic, edgard varese, tinny, percussive instrument, sine wave, monaural, vacuum tube, tinkly, theremins, dreadnaught, stroboscopic, sound, decrescendo, chromatic scale, echoic, harmonic progression, overloud, valveless, formant, reverberant, undulant, transistorized, diatonic scale, soundless, tonal, polytonal, microtonal, cassette deck, dipole antenna, pointillistic, scart, beethovenian, throatier, speech intelligibility, omnidirectional, plosive, cacophonic, resonant cavity, shawm, chorded, monotonic, tritone, unmodulated, vernier, basso profundo, heterodyne, unmelodic, woodwind instrument, bass clef, valve trombone, wavey, infrasonic, reed instrument, bakelite, polyphonic, harmonic, flutelike, microphonic, glottal, cinemascope, hypnagogic, edgeless, rattly, fortissimo, melismatic, tuning fork, sibilant, lucent, cor anglais, chromatic, crackly, muffled, plink, krautrock, clangorous, galvanic, violas da gamba, kyrie eleison, dichroic, palatal, muzzy, achromatic, handelian, projection screen, adolphe sax, musical accompaniment, prismatic, tranced, resonant, sigmoid, lavalier, dyna, polychromatic, ghetto blaster, lightspeed, toneless, audio, stereo, video, definition, tape, multichannel, shortwave, multitrack, prerecorded, facsimile, audiovisual, digitized, fi, track, cinematographic, computerised, monochrome

quadraphonic system, quadraphony, quadriphonic system

biaural, two-channel