Roland JV-880 - Page 66

The Scale
Tune
function
allows you to
create different
tunings
for
the
notes
of
a
scale.
Equal
Temperament
This tuning
divides one
octave
into
twelve
equally spaced
tones. This
temperament
is
the most
commonly
used
in western
music.
An OFF
setting of the
scale tune
switch
sets the JV-880 to
equal
temperament.
Just
Temperament
(when
tonic is C)
Compared to
equal
temerament,
in
which
all notes of the scale are
equally "out
of tune,"
this
tuning puts
the
three notes
of a
major triad
in
perfect
tune.
However, this effect
is
possible only
when
playing
in one
key.
Chords
for other keys
are
more
dissonant. The
chart below shows
the
pitch
differences
for
each note
when the
tonic
is C.
Arabic
Scale
In the
Arabic
scale, the
pitches
of E
and
B are
lower
than those
of the
equal
temperament
scale by
half
of
a
semitone,
and C#,
F# and
G#
are
higher
by
half of a
semitone.
Besides the
scales
of G
—
B,
C—
E,
F_G#,
A#—
C# and
D#—
F#,
there
are three
neutral keys
(the scale
between
major
third and
minor
third),
and
on the
JV-880
the
Arabic
scale
can be
played in the keys
of G, C
or F.
[Setting
example]
Note
Equal
Temperament
Just Temperament
(when tonic is C)
Arabic
Scale
c
-6
c#
-8
-5
D
+4
-2
D#
+16
-12
E
-14
-51
F
-2
-8
F#
-10
+43
G
+2
-4
G#
+14
+47
A
-18
A#
+14
-10
B
-12
-49