APPLIED ACOUSTICS SYSTEMS Strum Acoustic GS-1, Руководство пользователя

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4.2 Playing with Auto-Strum 29
4.2.2 Chord Change
Music engraving by LilyPond 2.10.33—www.lilypond.org
Figure 12: Re-triggering a downstroke.
Once a chord has been played, the chord detection, voicing and strumming modules are only
triggered when a new note is played; releasing notes from a chord has no effect. Consequently,
Strum
holds the current chord as long as all its notes are not released. This can be used to make
rapid chord changes. For example, it is possible to switch from a C chord to a G chord without
muting the strings by playing C-E-G and then by replacing C and E by B and D without releasing
the G as shown in Figure 13. The same effect can be obtained with chords which do not share
common notes by using the hold pedal in
Hold Chord mode.
Music engraving by LilyPond 2.10.33—www.lilypond.org
Figure 13: Smooth chord transition.
On the other hand, if one wishes to remove a note from a chord, for example to switch from a
C7 chord (C-E-G-B [ ) to a C chord (C-E-G), it is not sufficient to release the B [ key. It is necessary,
in order to trigger again the chord detection module, not only to release the B
[
from the chord but
also to release another note from the chord, for example the G, and replay it when one wants to
strum the new chord.
4.2.3 Chords and Change of Pitch
Playing chords on higher or lower notes on the keyboard has a similar effect on
Strum
’s fretboard.
With so-called Lowest chord types (Open-Lowest, Movable-Lowest and Drop-Lowest) Strum will
make sure that the lowest note played on the keyboard is also the lowest one played in the guitar
chord. These chord types are useful when it is necessary that a succession of chords follows a
certain bass motion.
With the so-called Root chords (Open-Root, Movable-Root), chords detected as inverted are
played on the root note located below the lowest note played on the keyboard (if possible).