Published by PitchChanger · Updated · How these guides are made
How to use this workflow
Write the signed interval
Use a positive integer for an upward shift and a negative integer for a downward shift.
Calculate the multiplier
Evaluate 2 raised to the power s/12, then multiply the original frequency in hertz.
Apply the available control
Open Pitch Changer, choose that whole-semitone shift and leave speed at 100% for a pitch-only edit.
Worked example: move a 220 Hz reference up five semitones
The multiplier is 2^(5/12) = 1.334839854. Multiplying 220 Hz gives 293.6648 Hz. This is an original arithmetic example, not a detector measurement or a claim that every audio partial will export with zero error.
Reverse the calculation with −5: 293.6648 × 0.749153538 = 220. The inverse multiplier is the reciprocal, so subtracting the percentage increase from 100% is not the inverse operation.
Swipe or scroll sideways to read all columns.
| Shift | Multiplier | 220 Hz becomes |
|---|---|---|
| -12 | 0.500000 | 110.000 Hz |
| -5 | 0.749154 | 164.814 Hz |
| 0 | 1.000000 | 220.000 Hz |
| 5 | 1.334840 | 293.665 Hz |
| 12 | 2.000000 | 440.000 Hz |
Choose the control that matches the calculation
A frequency ratio is not a speed setting for this independent pitch workflow. Entering 133% speed would shorten the performance; +5 semitones at 100% speed expresses the intended pitch task.
The site exposes integer steps between −12 and +12 semitones. A calculated fractional interval is useful as a reference but cannot be entered as an arbitrary cents adjustment. Keep a copy of the source and compare the same phrase after export.