HP-137: Using the Transpose Feature
Use the following procedure to Transpose:
1. Press and hold the volume button.
2. Use the [C2-B2] notes to select a desired key.
3. Hold down the volume button and press the [C2] key, to return to normal play.
Refer to Owners Manual-page 10, for Transposing information and page 16 for exact key location to be pressed.