Casio VL-80 Operation Manual page 14

To produce a semitone, depress thé note key while pressing thé
S key.
Each time you press a key on thé keyboard thé note will be
shown by numbers on thé display.
Try a simple melody!
J
J J
El CD d) (D (D
I— S) S) CD ® (D (D 03 —
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