triplet - Three notes of equal length that are to be performed in the duration of
two notes of equal length.

tonic - The note upon which a scale or key is based.

tone - The particular sound of an instrument or voice, as well as the performer's
particular coloring of that sound.

tonality - The principal of organization of a composition around a tonic based upon
a major or minor scale.

time signature - A symbol placed at the left side of the staff indicating the meter
of the composition.

timbre - The quality of a sound; that component of a tone that causes different
instruments (for example a guitar and a violin) to sound different from each other
while they are both playing the same note.

snare drum - A drum common in orchestral, band, and jazz music with two drum heads.
It is named after the "snares" or strings stretched across the lower drum head.

sixteenth note - A note having the time duration of one sixteenth of the time
duration of a whole note.

seventh chord - A chord consisting of a root note, the third above the
fifth above the root, and the seventh above the root.

sequence (music) - A restatement of an idea or motif at a different pitch level
from the original.

score - The entirety of the instrumental and vocal parts of a composition in
written form, placed together on a page in staves placed one below the other.

root - The tonic or fundamental note of a chord.

rests - A symbol standing for a measured break in the sound with a defined
duration.

quarter note - A note having the time duration of one fourth of the time duration
of a whole note.

polyrhythm - The use of several patterns or meters simultaneously, a technique used
in 20th century compositions.

note - A notational symbol used to represent the duration of a sound and, when
placed on a music staff, to also indicate the pitch of the sound.

motif - A short tune or musical figure that characterizes and unifies a
composition.

middle C - The name given to the note that has the pitch value of 261.63 Hz. It is
the note on the ledger line halfway between the bass and treble clef on the great
staff.

melody - A tune; a succession of tones comprised of mode, rhythm, and pitches so
arranged as to achieve musical shape, being perceived as a unity by the mind.

measure - American term, equivalent to the English term "bar ", signifying the
smallest metrical divisions of a composition, containing a fixed number of beats ,
marked off by vertical lines on the staff.