Function shiftPitchClassBaseValue

shiftPitchClassBaseValue(
    baseValue: string,
    inputType: "fraction" | "decimalRatio" | "cents" | "stringLength",
    targetOctave: 0 | 1 | 2 | 3 | 4,
): string
Shifts a pitch class base value to a different octave.

This function transposes a pitch class value by octaves, handling the conversion appropriately for different input formats. It's used when generating pitch classes across multiple octaves from a single octave template.
Parameters
- baseValue: string
  The original pitch class value as a string
- inputType: "fraction" | "decimalRatio" | "cents" | "stringLength"
  The format of the input value
- targetOctave: 0 | 1 | 2 | 3 | 4
  The target octave (0, 1, 2, 3, or 4)
Returns string
The shifted value in the same format as the input
Example
```
// Shift a fraction up one octave
shiftPitchClassBaseValue("3/2", "fraction", 2) // Returns "3/1" (doubled)
```
Example
```
// Shift cents up one octave
shiftPitchClassBaseValue("701.955", "cents", 2) // Returns "1901.955" (+1200 cents)
```
- Defined in functions/convertPitchClass.ts:177