A professional who operates console to regulate volume level and quality of sound during filming of motion picture, phonograph recording session, or television and radio productions. Responsibilities include:

• Determines acoustics of recording studio and adjusts controls to specified levels.
• Directs installation of microphones and amplifiers for use in sound pickup.
• Turns knobs and dials on console while recording to cut microphones in and out, and to blend output of individual microphones to obtain balance between music, dialog, and sound effects.
• Instructs performers to project voices for pickup by microphones.
• Copies and edits recordings, using recording and editing equipment.
• May test machines and equipment, using electronic testing equipment, such as ohm and voltage meters, to detect defects.
• May repair and replace audio amplifier parts.