Sound engineers

Audio engineers
Musical engineers
Sound controllers
Sound engineering technicians
Soundmen

Work cat.: 98-87331: Dawson, D. Life on the road, 1998: p. vii, etc. (soundman; audio engineer)
Dict. of occupational titles, 4th ed. (sound controller: operates sound mixing board to control output of voices, music, and previously taped sound effects during stage performances)
The O*NET dict. of occupational titles, 1998 ed. (sound engineering technicians: operate machines and equipment to record, synchronize, mix, or reproduce music, voices, and previously recorded sound effects)
Amer. heritage dict., 3rd ed. (soundman: one in charge of recording, transmitting, or amplifying sound or of producing sound effects, as for a television or radio braodcast)
WWW, Apr. 26, 1999 (usage in documents retrieved by Netscape search: sound engineers, sound engineering)
Applied science and technology literature in First Search, Apr. 26, 1999 (audio engineers, sound engineers, musical engineers)
LC database, Apr. 27, 1999 (sound engineers; audio engineers; sound technician)