Function default

default(
    allPitchClasses: default[],
    pitchClass: undefined | default,
    octaveShift: number,
): default
Shifts a pitch class by a specified number of octaves using array lookup.

This is the preferred method for shifting pitch classes as it uses the pre-computed pitch class array for accuracy. It finds the target pitch class in a different octave by calculating the appropriate array index.
Parameters
- allPitchClasses: default[]
  Complete array of all available pitch classes
- pitchClass: undefined | default
  The pitch class to shift (can be undefined)
- octaveShift: number
  Number of octaves to shift (positive = up, negative = down)
Returns default
The shifted pitch class, or empty pitch class if operation fails
Example
```
// Shift a pitch class up one octave
const shifted = shiftPitchClass(allPitches, originalPitch, 1);
```
Example
```
// Shift a pitch class down two octaves  
const shifted = shiftPitchClass(allPitches, originalPitch, -2);
```
- Defined in functions/shiftPitchClass.ts:46