Roland AIRA Compact E-4 Voice Tweaker - Manual (Page 14)

Adding Harmonies (HARMONY)
14
Setting the harmony type (HARMONY TYPE)
1. Move the [FORMANT] slider while holding down the [HARMONY] button.
The chord structure for each type is shown below.
The values shown in parentheses apply when using minor scale settings.
Value Voice 2 Voice 3 Voice 4
UdP5 (UpDownP5) +12 -12 +7
Updn (UpDown) +12 -12
-Oct (-Octave) -12
Oct (Octave) +12
P5
(P5) +7
3rd
(3rd) +4 (+3)
5th
(5th) +4 (+3) +7
-5th
(-5th) +4 (+3) -5
7th
(7th) +4 (+3) +7 +11 (+10)
-7th (-7th) +4 (+3) +7 -1 (-2)