Roland E-66 Owner's Manual page 90

When the MIDI LED [43] is lit, Sl Ss
the TUNE buttons [28] will
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select the various MIDI PARTS Ви SELECT (43) „И qos 7.
[28] (parameters), and the bw
TRANSPOSE but-tons [39] can
be used to set or change the
MIDI DATA [29] (value) of each
parameter.
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You can select any MIDI PART |? -LØ N c
(parameter) using the '+' and '-' о Ф DATA (29) 2 ee
buttons [28]. „___<= 292 а
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Once you have selected the
desired parameter, you can
change the MIDI DATA (value)
using the '+' and '-' buttons [
29]; the current value will be
displayed for a few seconds.
If you press and hold either
MIDI DATA [29] button, the
value will change continuously.
When you release either MIDI
DATA [29] button, the set value
will be displayed for a few
seconds, and then the display
will indicate the selected MIDI
parameter.
To exit the MIDI mode, press
the MIDI SELECT button[43]
again (so the LED goes out); the
display will return to its
previous state — indicating the
selected TONE or MUSIC
STYLE.