-Comping: Comping refers to the chordal accompaniment provided by pianists or guitarists in jazz bands. This accompaniment is often syncopated. The term "comp " is probably derived from a contraction of the wo rd accompany or complement.
-Cornet: the trumpet's close cousin, is common in early jazz and sounds like a trumpet but is mellower and more restrained.
-Drums: the drum sets is like a piano that the drummer can play a number of instrumental parts simultaneously. But the drums cannot play specific pitches to create chords. Drums are example of percussion instruments.
-Duple meter: a meter in which each measure is divided into two beats, or a multiple thereof (quadruple meter), for example, in the time signature 2/4, each measure contains two quarter note beats.
-Dynamics: the softness and the loudness of the musical sound.
-Eighth note: is a musical note played for one eighth the duration of whole note.
-Flats: means "lower in pitch"; the flat symbol lowers a note by a half step.
-Flugelhorn: trumpet-like instrument, which is even mellower than the cornet.
-Guitar: comes in both electric and acoustic versions. The older acoustic guitar was very much a rhythm instrument in classic jazz because it played chords on each beat.
-Half note: is a note played for half the duration of a whole note and twice the duration of a quarter note.
-Harmonic substitution: is the technique of using a chord in the place of another, often related, chord in a chord progression. Often substituted chords in the original progression to create variety and add interest to a piece. The substitute chord must have some harmonic quality and degree of function in common with the original chord, and often only differs by one or two notes. .
-Harmony: is the wounding of more than one note at the same time. It's often made up of chords.
-Head: is the main theme of a piece of music, particularly in jazz, where the term takes on a more specific set of connotations.
