Function frequencyOf

frequencyOf(step: number, tuning?: Tuning): number
Frequency in Hz of a step index under a tuning.
Parameters
- step: number
  Step index (a MIDI number under 12-EDO).
- tuning: Tuning = TWELVE_TET
  The tuning (default 12-TET).
Returns number
The frequency in Hz.
Example
```
import { frequencyOf } from '@libraz/libcantus';
frequencyOf(69); // 440 (A4 in 12-TET)
frequencyOf(60); // middle C in Hz
```
- Defined in core/tuning/index.ts:83