Overdubbing (the process of making an overdub, or overdubs) is a technique used by
recording studios to add a supplementary recorded sound to a previously recorded performance.Tracking (or "laying the basic tracks") of the
rhythm section (usually including drums) to a song, then following with overdubs (solo instruments, such as
keyboards or
guitar, then finally vocals), has been the standard technique for recording
popular music since the early 1960s.Overdubs can be made for a variety of reasons. One of the most obvious is for convenience; for example, if a
bass guitarist is temporarily unavailable, the recording can be made and the bass track added later. Similarly, if only one or two guitarists are available, but a song calls for multiple guitar parts, a guitarist can play both lead and rhythm
guitar (such as in
Cream's "
Sunshine of Your Love", when it would have been physically impossible for
Eric Clapton to solo and play rhythm guitar simultaneously). Singers who also play an instrument find overdubbing a convenience, since it allows them to focus on one role at a time.
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