You can layer two different tones across the entire keyboard to enrich the sound of your music. Follow this procedure:
1) Press the [piano] button, and use the [-] and [+] buttons to select a tone.
2) Press the [Other] button, and then use the [-] and [+] buttons to select a tone.
3). Hold down the [Piano] button and simultaneously press the [Other] button to turn on the "Dual Play" feature.
You can adjust the balance between the two tones, if you prefer more volume from one of the layered tones. Follow this procedure (this will only work when in "dual" mode):
1)While holding down the [Piano] button and the [Other] button, use the volume buttons to adjust the balance. The first number will reflect the volume of the piano sound, while the second number will reflect the volume of the "other" tone.