Function pitchClassOf

pitchClassOf(value: number): number
Reduce a MIDI pitch, a bare pitch class, or any signed offset to a pitch class in [0, 11].

This is the library's single definition of pitch-class arithmetic: every layer routes through it so a fractional pitch reduces the same way everywhere. A non-integral input is rounded to the nearest semitone first, so a microtonal 60.6 reads as C# rather than C.
Parameters
- value: number
  A MIDI pitch, pitch class, or signed semitone offset.
Returns number
The pitch class in [0, 11].
Example
```
import { pitchClassOf } from '@libraz/libcantus';
pitchClassOf(61); // 1
pitchClassOf(-1); // 11
pitchClassOf(60.6); // 1
```
- Defined in src/core/pitch/index.ts:145