Setup Mode and the Setup Editor
The Arpeggiator (ARPEG) Page
7-41
Limit Option
This parameter determines what the Arpeggiator does when it has shifted the currently latched
notes up (or down) to the shift limit. Stop causes the Arpeggiator to stop when it reaches the
shift limit. Reset causes the Arpeggiator to return to its original pitch and repeat the latched
cycle of notes, transposing each cycle according to the settings for Note Shift and Shift Limit. If
the limit allows the notes to go out of MIDI range (for example, if you set Shift to 12, set the limit
to 80, and play C4), then those ÒghostÓ notes donÕt sound, but they take up rhythmic space: the
Arpeggiator waits for the cycle to play itself out before starting over.
Unipolar means that after playing up to the shift limit, the Arpeggiator begins shifting notes in
the opposite direction, until it reaches the original pitch, where it reverses again. To determine
the next note when it reaches the shift limit, the Arpeggiator calculates the interval between the
shift limit and what the next note would be if the shift limit werenÕt there. It then plays the note
that is the calculated interval lower than the last note before the shift limit. The same thing
happens in reverse when the arpeggiated notes get back down to the original pitch. The
following table makes this easier to visualize by showing the result of arpeggiating one note
(C4) in Unipolar mode, with Note Shift set to 3 ST and various values for Shift Limit.
Bipolar starts out the same way as Unipolar, but during downward note shifting, it continues
past the original pitch until it hits the shift limit in the opposite direction, where it reverses again.
Flt Reset adds a bit of apparent randomness to the process. Flt stands for ÒFloat,Ó and it means
that when the Arpeggiator reaches the shift limit, it resetsÑbut not to its original pitch as with
plain Reset. Like Unipolar and Bipolar, it looks at the Þrst note that would exceed the shift limit,
and calculates the interval between that note and the shift limit. It then restarts the cycle of
latched notes, transposing the entire cycle by the interval it just calculated, then shifting each
subsequent cycle by the value of Note Shift, until it reaches the shift limit again.
HereÕs a very simple example. Suppose that the only note in the Arpeggiator cycle is C4, Note
Shift is 4 (a third), and Shift Limit is 7 (so notes wonÕt get shifted above G4). The Arpeggiator
plays C4, then E4. The next note should be G
#
4, but thatÕs above the shift limitÑso the K2600
calculates the difference between that G
#
4 and the shift limit (G4): one semitone. It adds that
Shift Limit
Resulting Arpeggiation (When LimitOption is Unipolar)
Comment
Up Down Up
6 ST (F#4)
C4, D
#
4, F
#
4, D
#
4, C4
D#4, …
Same notes play in both directions
when Shift Limit is a multiple of
Note Shift
7 ST (G4)
C4, D
#
4, F
#
4, E4, C
#
4, D
#
4, …
Last upward note before shift limit is
F#4, next upward note would be
A4, which is 2 ST from shift limit
(G4); therefore first downward note
is E4 (2 ST below last upward note)
8 ST (G
#
4) C4, D
#
4, F
#
4,
F4, D4,
D
#
4, …
A4 is 1 ST from shift limit, therefore
first downward note is F4 (1 ST
lower than last upward note)
9 ST (A4)
C4, D
#
4, F
#
4, A4 F
#
4, D
#
4, C4,
D#4, …
All symmetrical again; now A4 is
within shift limit
10 ST (A#4)
C4, D
#
4, F
#
4, A4, G4, E4, C
#
4, D
#
4, …
Next upward note would be C5,
which is 2 ST from shift limit
11 ST (B4)
C4, D
#
4, F
#
4, A4, G
#
4, F4, D4, D
#
4, …
C5 is 1 ST from shift limit
12 ST (C5)
C4, D
#
4, F
#
4, A4, C5, A4, F
#
4, D
#
4, C4,
D#4, … Symmetrical again, including C5
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