Normally the Portamento Time parameter is set to a value higher than 0, causing notes to ''glide'' from one to the next as they are played.

To disable this function:

1) Press the [FUNCTION] button to enter the Function mode.
2) Press the [7] 'Voice Memory' button. The display will indicate the current Portamento Time.
3) Move the Data Entry slider to its minimum position. The display will read, 'PORTA TIME = 0'.
4) To exit the Function mode, press the 'Memory Select' [INTERNAL] button.
Reference: Owner's Manual p. 18-19