HP307: Layering Two Tones on the HP307

Use the following procedure to layer two Tones on the HP307 (Dual Play):

1. While holding down the Piano button, press the Strings button so that both of them are lit.
2. To select a different tone for the Piano, press the + / - buttons.
3. To select a different tone for the Strings, hold down the Strings button and press the + / - buttons.
   NOTE: If you hold down the Strings button but do not make a new selection, you will automatically exit the layer mode.
4. To exit the Dual Play layer mode, press any of the tone buttons.