The tempo slider stopped working when I turned the sync function off.

To keep the tempo from changing suddenly directly after the sync function is turned off, the unit is designed so that the tempo of audio output does not change when the tempo slider is operated until the tempo at the position of the tempo slider matches the tempo of audio output.

The BPM value corresponding to the tempo slider's position is displayed on the LCD's playing speed display. Operate the tempo slider to match this with the value displayed in the square frame directly below this. After this is done, the tempo slider can once again be operated.