Master Tuning; Touch(F3,F#3,Ab3,Bb3) - Kurzweil M90 User Manual

Voice/Function
Use the Data Control knob to select the desired Octave.
Turning the Data Control knob clockwise will raise the keyboard's pitch in semitone
increments, and turning it counter-clockwise will lower it in semitone increments.
Value:-12~012.

Master Tuning

Pressing this key will set the Data Control knob to raise or lower ( "fine-tune" ) the Master
Tune setting of the piano.
Press the [Function/Right] button to enter Edit Mode.
Press the Master Tuning key (Bb1).
The LED display will momentarily show:
Bb1
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Use the Data Control knob to select the Master Tuning.
The LED display will show a positive, negative, or zero value between -64 and 063.
Of course, this piano never actually "goes out of tune," but the Master Tuning feature can
be useful when you are playing along with another instrument or recording that may be
slightly above or below standard pitch.
Touch
The Touch Select control, sometimes referred to as Velocity Curve, lets you decide how
the pressure with which you hit the keys determines the volume at which the notes play.
This piano provides you with four different keyboard sensitivity options
Normal (Ab3 key) is the default setting, and is designed to be useful for most players with
an "average" touch (i.e.: people who play with an average amount of
force). When selecting this option
Low (F#3 key) is a sensitivity setting that generates lower velocity values for the same
force. This setting is useful for playing more quietly, even if you have a
"heavy" touch. When selecting this option
High (Bb3) is a sensitivity setting that generates higher velocity values for the same force.
This setting is useful for playing more loudly, even if you have a naturally "light"
touch. When selecting this option explained further below), the LED display
Fixed (F3 key) is a setting that effectively disables sensitivity, meaning the keyboard will
generate a fixed velocity value of 100 regardless of how hard or soft you
play. When selecting this option(explained further below), the LED display
shows:
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