The Tonal Pitch Class (tpc) is used to differentiate among notes with the same MIDI pitch but with different representation (also covering enharmony). The tpc is used by several objects properties:
Harmony Object
.base
Harmony Object
.root
Note Object
.tpc
Tonal Pitch Classes in numeric order
| -1 |
Fbb |
|
6 |
Fb |
|
13 |
F |
|
20 |
F# |
|
27 |
F## |
| 0 |
Cbb |
|
7 |
Cb |
|
14 |
C |
|
21 |
C# |
|
28 |
C## |
| 1 |
Gbb |
|
8 |
Gb |
|
15 |
G |
|
22 |
G# |
|
29 |
G## |
| 2 |
Dbb |
|
9 |
Db |
|
16 |
D |
|
23 |
D# |
|
30 |
D## |
| 3 |
Abb |
|
10 |
Ab |
|
17 |
A |
|
24 |
A# |
|
31 |
A## |
| 4 |
Ebb |
|
11 |
Eb |
|
18 |
E |
|
25 |
E# |
|
32 |
E## |
| 5 |
Bbb |
|
12 |
Bb |
|
19 |
B |
|
26 |
B# |
|
33 |
B## |
Tonal Pitch Classes in pitch order
| 11 |
|
31 |
A## |
|
19 |
B |
|
7 |
Cb |
| 10 |
|
24 |
A# |
|
12 |
Bb |
|
0 |
Cbb |
| 9 |
|
29 |
G## |
|
17 |
A |
|
5 |
Bbb |
| 8 |
|
22 |
G# |
|
|
|
|
10 |
Ab |
| 7 |
|
27 |
F## |
|
15 |
G |
|
3 |
Abb |
| 6 |
|
32 |
E## |
|
20 |
F# |
|
8 |
Gb |
| 5 |
|
25 |
E# |
|
13 |
F |
|
1 |
Gbb |
| 4 |
|
30 |
D## |
|
18 |
E |
|
6 |
Fb |
| 3 |
|
23 |
D# |
|
11 |
Eb |
|
-1 |
Fbb |
| 2 |
|
28 |
C## |
|
16 |
D |
|
4 |
Ebb |
| 1 |
|
33 |
B## |
|
21 |
C# |
|
9 |
Db |
| 0 |
|
26 |
B# |
|
14 |
C |
|
2 |
Dbb |