Yamaha Electone EL-400 Owner's Manual page 42

1) Turning on the Tremolo effect (set to standby):
You cannot use the Tremolo effect only by turning on the TREMOLO (FAST)
button. First, you need to turn the effect on in the desired voice section(s).
Independently applied to each voice section.
Select (turn on) Tremolo
1
Press the desired voice button on the panel twice to display one of the
Voice Condition pages.
3
The Voice Condition page appears.
2
Select page 3 of the Voice Display using PAGE buttons at the right side
of the LCD display.
DATA CONTROL
3
Select Tremolo to turn it on.
DATA CONTROL
42
LEAD VOICE
MAX
VIOLIN FLUTE
1
OBOE TRUM- TO
PET LOWER
MIN
DATA CONTROL PAGE
DATA CONTROL