Casio Casiotone CT-S1 User Manual page 41

■ To disable piano stretch tuning
Piano stretch tuning, which is normally used for piano tuning, sharpens high notes and flattens low
notes.
1.
While holding down FUNCTION, press the A2 keyboard key.
This disables stretch tuning.
• Each press of the keyboard key sounds a tone that lets you know what setting was selected.
High tone: On
Low tone: Off
2.
Release FUNCTION to complete the setting operation.
C2 C3
A2
EN-40
Controlling the Sound of a Performance
C4 C5 C6 C7