Unit 1 Vocab Definitions:

Tetrachord - whole whole half (D, E, F for instance)
Semitone - a half step
Rhythm - recurring at regular intervals
Meter - the basic pattern of beats in successive measures of a piece of music: it is usually indicated in the time signature
Time Signature - The time signature (also known as "meter signature") is a notational convention used in Western musical notation to specify how many beats are in each measure and what note value constitutes one beat. 4/4 = one beat per quarter note.

There are four different types of metre in common use:
  • simple duple (ex. 2/2)
  • simple triple (ex. 3/4)
  • simple quadruple (ex. 4/4)
  • compound duple (ex. 6/8)
  • compound triple (ex. 9/8).
  • compound quadruple (ex. 12/8)

Asymmetrical Meter - a meter such as 5/8 or 7/4 where there is unequal division of the measure. the accents occur irregularly
Beam - A beam in musical notation is a thick line frequently used to connect multiple consecutive eighth notes (quavers), or notes of shorter value (indicated by two or more beams), and occasionally rests. Beamed notes or rests are groups of notes and rests connected by a beam; the use of beams is called beaming.
Measure - a bar or measure is a segment of time defined as a given number of beats of a given duration.
Hemiola - In modern musical parlance, a hemiola is a metrical pattern in which two bars in simple triple time (3/2 or 3/4 for example) are articulated as if they were three bars in simple duple time (2/2 or 2/4).
Augmentation - In music and music theory augmentation is the lengthening or widening of rhythms, melodies, intervals or chords.
Diminution - Diminution is the opposite of augmentation.

Tempo - the speed at which a composition is to be played
Presto - very fast (168–200 bpm)
Vivace - lively and fast (≈140 bpm)
Allegro - fast and bright or "march tempo" (120–168 bpm)
Andante - at a walking pace (76–108 bpm)
Adagio - slow and stately (literally, "at ease") (66–76 bpm)
Largo - very slow (40–60 bpm), like lento
Grave - slow and solemn