Letter Names
Use letters (C, D, E, F, G, A, B) to identify musical pitches.
Solfège
Use syllables (Do, Re, Mi, Fa, Sol, La, Ti) to represent and train pitch relationships.

Letter Names
A group of pitches used together as a musical unit.
Dyad : a set of 2 notes.
Triad : a set of 3 notes (chord).
Tetrad : a set of 4 notes.
Pentrad : a set of 5 notes.
