Roland E-4 Owner's Manual page 17

Adding a chord (HARMONY)
1. Press the [HARMONY] button.
You can press the [HARMONY] button to add more carrier voices.
You can also set the pitch of the carrier.
Setting the carrier to a fixed pitch
Ø
Correcting the Pitch (AUTO
Setting the chord type
Ø
HARMONY_TYPE(P.14)
Setting the chord key and scale
Ø
KEY_SCALE(P.13)
PITCH)(P.8)
Using a Vocoder Voice to Alter the Sound (VOCODER)
17