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About Multi Fingering
The Auto Accompaniment function automatically generates bass and chord accompaniment for you to play along with, by
using Multi Fingering operation. You can change the chords of the accompaniment by playing keys in the AUTO ACCOMP
SECTION of the keyboard using either the "Single Finger" or "Fingered" method. With Single Finger you can simply play a
one-, two- or three-finger chord indication (see Single Finger Chords below). The Fingered technique is that of
conventionally playing all the notes of the chord. Whichever method you use, the PortaTone "understands" what chord you
indicate and then automatically generates the accompaniment.
Though detection of the Single Finger and Fingered methods is automatic with Multi Fingering, you can set Auto
Accompaniment to function exclusively in either the Single Finger or Fingered mode.
To set Auto Accompaniment to Single Finger:
Turn the power off, then hold down the "-" key on the numeric keypad and simultaneously turn the power on. ("SINGLE"
briefly appears in the display.)
To set Auto Accompaniment to Fingered:
Follow the same steps as above, holding down the "+" key instead. ("FINGERED" briefly appears in the display.) To switch
back to Multi Fingering operation, simply turn the power off and on again.
Single Finger Chords
Chords that can be produced in Single Finger operation are major, minor, seventh and minor seventh. The illustration below
shows how to produce the four chord types. (The key of C is used here as an example; other keys follow the same rules. For
example, B
7 is played as B
b
Major chord:
C
Press the root note of the chord.
In Single Finger, the AUTO ACCOMP SECTION is set between the C1 key (the lowest key) and the C#2 key.
Fingered Chords
Using the key of C as an example, the chart below shows the types of chords that can be recognized in the Fingered
mode.
Fingered Chords in the Key of C
Notes enclosed in parentheses are optional; the chords will be recognized without them.
C
C
♭
5
7
• If the chord is inverted (i.e., C-E-G is played as G-C-E), the PortaTone will
still recognize it as a C chord.
• Minor 6th chords are recognized only in root position, however; all other
inversions are interpreted as minor 7th/flatted 5th.
• If augmented and diminished 7th chords are inverted, the lowest note will
be recognized as the root.
• 7th flatted 5th chords may be played with the lowest note as the root or
the 7th.
8
and A.)
b
Seventh chord:
C7
Press the root note together with
any white key to the left of it.
C
sus
Cm
7
4
CM
CmM
7
7
Minor chord:
Cm
Press the root note together with
any black key to the left of it.
Caug
aug
C
(7
)
7
Cm
♭
Cm
5
7
6
• 1+2+5 chords are recognized only in root position; all other inversions
are interpreted as suspended 4th.
• 7th Augmented and diminished 7th chords are interpreted as simple
augmented and diminished.
• Chord Cancel function
When the auto accompaniment is set to Fingered, The PortaTone also
has a Chord Cancel function to stop the chord accompaniment but allow the
rhythm pattern to continue playing.
To use Chord Cancel, simultaneously press any three consecutive notes in
the AUTO ACCOMP SECTION; for example, C, C# and D.
Minor seventh chord:
Cm7
Press the root note together with
any white and black key to the
left of it (three keys altogether).
Cdim
dim
Cm
(
7)
7
Csus
C
4
1+2+5