Korg EC150 User Manual page 28

Button
VIBES/GUITAR
Both LEDs
turned off
To check the currently selected temperament, hold down the TOUCH button, and
look at which of the above LEDs is turned on.
Note: When the power is turned on, the equal temperament will be automatically
selected.
About stretched tuning.
1 and PIANO 2 sounds use a "stretched tuning" that makes the notes of the lower
range slightly flatter than equal temperament, and the upper range slightly sharper.
This is how an acoustic piano is normally tuned by professional tuners.
26
Temperament
Kirnberger. This is the Kirnberger III scale invented by Johann Phillip
Kirnberger in the early 18th century, and is used mainly for tuning harpsi-
chords.
Equal temperament. Nearly all keyboard instruments today use equal
temperament. This temperament spaces all semitones at equal dis-
tances, and allows identical scales to be played in any key.
In order to produce the most natural resonance, PIANO
Chapter 4