Roland FR-3s - Manual (Page 40)

Editing settings | PARAM LIST parameters
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FR-3s/FR-3/FR-3sb/FR-3b V-Accordion
The FR-3sb/b is supplied with additional white and
black buttons that may come in handy. The white but-
tons come in two varieties: normal buttons and knurled
buttons. The latter are usually used to indicate the “C”
notes. Note: This parameter is not reset when you load the factory
defaults (page 55).
C-Griff Europe C-Griff 2 B-Griff Bajan
Treble Mode (1/2)