Instrumental pieces designed for performance in order to exploit a facet of performing technique. For musical works and exercises designed for practice with the aim of perfecting a facet of performing technique see Studies (Music).
Instrumental pieces designed for performance in order to exploit a facet of performing technique. For musical works and exercises designed for practice with the aim of perfecting a facet of performing technique see Studies (Music).
Recordings containing material that differs from the commonly issued material recorded at the same session, or recordings containing multiple versions of one or more recorded selections. For unofficial live or studio recordings, usually distributed without authorization, see Bootlegs (Sound recordings).
