Wersi Abacus, User Manual

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Dynamic Touch Push Button
One important characteristic of almost all musical instruments if the dynamic. A classical example is the Pianoforte (it
is named this way because you may play it soft, (piano), or loud, (forte) . But almost all other instruments have some
kind of dynamic that is not only limited to different volumes.
When you softly press down a Piano key, the generated tone spectrum is very different from the spectrum you will
hear when you hit the key with power (or harder). The same is true for a trumpet when it is blown softly, or loudly and
for almost all other musical instruments.
The Dynamic push button in the Upper group is used to turn the Dynamic touch ON or OFF for the Upper section, and
the Dynamic push button in the Pedal group turns this effect ON or OFF for the Pedal sound of your instrument.
The Lower group does not have its own push button and can be controlled only in the Virtual ‘Selector Settings’ .
If you hit the push button , the Dynamic is turned On or Off for the currently selected manual, if this manual is part of
the group where the push button is located.
Here is an example: You have selected the push button ‘Upper 2 Select’ and hit the button Dynamic in the Up -
per Selector group. The Dynamic for Upper 2 will be turned on, or off respectively (depending on its previous
state). The LED associated with the push button will light up or turn off.
When Dynamic touch is active, the volume and the tone spectrum of the generated sounds depend on how hard you
hit a manual or pedal key. Actually, the speed of the key movement is used to control the Dynamic, but this is almost
proportional to the strength of a key hit.
You can hear the dynamic effect very clearly with Piano sounds, but with other sounds such as Brass sounds for ex -
ample it may be more subtle or control different sound characteristics of the sound.
Tonewheel / Drawbar sounds use the Dynamic control in a different way. The ‘Dynamic’ controls the loudness of the
Percussion (Naturally the Drawbar Percussion must be turned on!)
Your OAS instrument has 14 different Dynamic types. You can assign each of these Dynamic types to each manual.
Please refer to the Advanced Selectors chapter.
Octave Offset Push Button
In the Selector Settings group is the Octave push button. Press an Octave push button once to increase the tuning
of the selected manual by one Octave. When you press the push button again, the tuning of that group is set another
octave up. The next push will set the tuning two octaves below normal, another touch will set the tuning one octave
below normal.
(So the order of the Octave offset cycle is +1, +2, -2, -1, 0).
When the LED in an octave push button is on, this indicate an active octave shift in the selected manual / selector.
The Chorus Effect Push Button
Also in the ‘Selector Settings’ group is the CHORUS button. If this button is active, a chorus effect is added to the
sounds of the selected manual. You may apply it to a piano sound in order to obtain a ‘Honky-Tonk’ type Piano for ex -
ample or to ‘Widen / Thicken’ sounds. The Chorus effect can also be set in the ‘Selector Settings’ on the Main Display.
LM Hold (Lower Selector Push Button)
When you activate the Hold Lower Push Button in the ‘Selector Settings’ group, all note that you play on the Lower
Manual are ‘Held’, even after you release the keys of the Lower Manual. Of course if you play another chord, or the
accompaniment stops, the ‘Held’ keys are released.