What kind of instrument is subing?

Answer 1

The term "subing" generally refers to a technique used in music, particularly in electronic music production, rather than an instrument itself. It involves substituting one sound or musical element for another, often to create a richer or more complex audio texture. In some contexts, particularly within genres like Dubstep, "subbing" can also refer to the use of sub-bass sounds, which are low-frequency bass tones that provide depth to a track.