Chord

A chord is a collection of notes with well-defined pitches sounding together, or sometimes suggested in some manner, such as arpeggiation.

Chords by size

• Dyad: 2 notes
• Triad: 3 notes
• Tetrad: 4 notes
• Pentad: 5 notes
• Hexad: 6 notes
• Heptad: 7 notes

Types of chords

• Dyadic chord
• Delta-rational chord

Chord relationships

• Chordal space
• The Seven Limit Symmetrical Lattices
• Harmonic Lattice Diagram