What is the term for the innovation also known as 'sound on sound' or 'overdubbing' that allows layering multiple vocal and/or instrumental parts asynchronously?

• A. Monophonic recording
• B. Multitrack recordings
• C. Direct-to-disc recording
• D. Sound-on-sound effects

Answer: (B)

The technique being tested is multitrack recording. This approach lets you record on separate tracks so you can layer multiple vocal and instrumental parts at different times and then mix them together. That’s what overdubbing and “sound on sound” refer to—the ability to add parts after others have already been laid down, rather than recording everything in a single take. Because you work on individual tracks, you gain precise control over balance, timing, and each part’s performance, enabling rich, composite textures that wouldn’t be possible with a single microphone or one live take.

Monophonic recording captures only one line at a time, so layering isn’t feasible. Direct-to-disc recording is about cutting directly to a master disc, bypassing tape, and doesn’t describe the layering capability. While “sound on sound” can describe the concept of overdubbing, the broader and more accurate term for this innovation is multitrack recording.