A performance can possibly be prepared out and rehearsed (practiced)—that is the norm in classical music, jazz large bands, and many well known music variations–or improvised more than a chord progression (a sequence of chords), which is the norm in compact jazz and blues groups. Rehearsals of orchestras, live performance bands and choirs are l

During the late Romantic interval, composers explored remarkable chromatic alterations of tonality, which include prolonged chords and altered chords, which established new seem "shades." The late 19th century saw a spectacular enlargement in the scale with the orchestra, and the commercial revolution assisted to build superior instruments, develop