Pad: It is start button.
Time display part is covered, and the part that greens when the cursor comes up.

Countup: It is display part of the introduction time.
Countdown: It is display part of remaining time.
Music length input

Please click only once in a browser first.
As a result, it becomes active.

Please click the pad when the music start.
Pressing the space key does the Countup.

When the Next music started, Please click again.
The Countup starts newly.

A basic operation is the above.

When you want to know the remaining time of the music, you click the music length input of the window upper part.
please type time of the next music.

For example, please type it with 321 if the next music is 3 minutes 21 seconds.