04 / Harmony lab
ADVANCED CHORDS
Know the full chord. Choose a voicing that fits the instrument.
01 / Piano voicing
02 / Guitar voicing
Six scientific pitches with octaves. Re-entrant tunings keep their written octaves.
Fret range + hand span
A span of 3 means, for example, frets 2–5. Open strings are allowed only when the lowest position is 0.
Read the chord, then voice it.
The formula is the full theoretical spelling. A practical voicing may omit tones; every omission is listed. A 13th chord has seven possible tones, so six strings cannot play the entire formula at once. Natural 11ths can clash with a major third; that tension is shown rather than silently rewritten.
Guitar suggestions contain one pitch per string, only chord tones, a bounded fret span, and no more than four fretting fingers. One barre is allowed only when it crosses no open, muted, or lower-fretted string. Shape labels are fret numbers, not a guarantee that every hand will find every grip comfortable. × = mute / do not pick; 0 = open. Diagram rows run string 1 at the top to string 6 at the bottom.
Piano notes use scientific pitch notation: middle C is C4, MIDI 60. The preview uses a simple synthesized tone. Copy includes MIDI numbers for a DAW. Double accidentals preserve the interval spelling: C°7 includes B𝄫, and C7(♯9) includes D♯.
Reference: Chord symbols and jazz voicing principles, Open Music Theory.