音程
An interval is the distance between two notes.
Berklee Online
table:interval
C-dur distance Expression Name Description (ja)
C 0 P1 Unison 完全1度
D 2 MA2 Major
2度
長2度
D#/E♭ 3 m3
♭3rd
増2度/短3度
E 4 MA3 Major
3rd
長3度
F 5 P4
完全4度
完全4度
F#/G♭ 6 増4度/減5度
G 7 P5
完全5度(P5)
完全5度
G#/A♭ 8
増音程
増5度/短6度
A 9 MA6 Major 6th 長6度
A#/B♭ 10
7th
短7度
H 11 MA7 Major 7th 長7度
C' 12 P8 Perfect Octave 完全8度
D' 14 Extension
9th
E' 16
F' 17 Extension
11th
F#' 18 Extension
#11th
G' 19
A♭ 20 Extension
♭13th
A' 21 Extension
13th
H' 23
https://ongakuriron.com/chapter1-interval2
https://en.wikipedia.org/wiki/Jazz_chord