Function toSoundingPitch

toSoundingPitch(note: NoteLike, instrument: TransposingInstrument): NoteData
The pitch an instrument sounds for a written note.

The interval decides the letter, so the spelling of the part survives the conversion: on a clarinet in A a written C sounds A, a written D sounds B, and a written D# sounds B# — a semitone count alone could answer C natural for that last one and lose the letter the part is written on. A note carrying an octave moves register with it — a written C4 sounds A3 — while an octave-less note stays octave-less, so a pure octave transposer leaves it alone.
Parameters
- note: NoteLike
  The written note, as the player reads it: a note name, a MIDI number, note data, or a Note.
- instrument: TransposingInstrument
  A built-in instrument name, or an interval naming a transposition the table does not carry.
Returns NoteData
The sounding note, at concert pitch.
Throws
If the note is malformed, or the instrument is neither a known name nor a spelled interval.
Example
```
import { formatNote, parseNote, toSoundingPitch } from '@libraz/libcantus';
formatNote(toSoundingPitch(parseNote('C4'), 'clarinetA')); // 'A3'
formatNote(toSoundingPitch('D#4', 'clarinetA')); // 'B#3'
formatNote(toSoundingPitch(parseNote('C4'), 'piccolo')); // 'C5'
```
- Defined in src/theory/transposition/index.ts:219