Interval
The space between two notes
Consonance
Intervals that sound stable: P1, m3, M3, P5, m6, M6, and P8
Dissonance
Intervals that sound less stable: m2, M2, P4, TT, m7, M7
Unison
An interval of the same note (P1).
Octave
An interval of eight notes (P8).
Enharmonic Intervals
Intervals that sound the same but are written differently.
Tritone
Another term for an interval of diminished 5th or Augmented 4th.
Compound Interval
An interval larger than an octave.
Simple Interval
An interval smaller than an octave.
Melodic Interval
An interval when one note is played after the other note.
Harmonic Interval
An interval when both notes are played at the same time.
Transposition
The process of rewriting a piece of music so that is sounds higher or lower in pitch.