For questions regarding the creation and use of electronic reproductions of synthesized or recorded sounds or portions of existing work. Sampling is specifically electronic, as opposed to, for example, quoting a piece of music during a live improvisation.
In music, sampling is the reuse of a portion (or sample) of a sound recording in another recording. Samples may comprise elements such as rhythm, melody, speech, sounds, or entire bars of music, and may be layered, equalized, sped up or slowed down, repitched, looped, or otherwise manipulated. They are usually integrated using hardware (samplers) or software such as digital audio workstations. (SOURCE)