Harmony
root note and bass note are notated as "tonal pitch class":
bb
b
-
#
##
C
0
7
14
21
28
D
2
9
16
23
30
E
4
11
18
25
32
F
-1
6
13
20
27
G
1
8
15
22
29
A
3
10
17
24
31
B
5
12
19
26
33
Properties
baseTpc
int
bass note as "tonal pitch class"
id
int
harmony identifier
rootTpc
int
root note as "tonal pitch class"