Music Tempo Changer

[How to use]
First, select one of the three modes on the start screen.
Manual Adjustment
Select a music file from your device's storage and press the + or – button to change the BPM of the music. Press the Enter BPM button to input and change the BPM.
Count Step
If you press the Start button and walk or run while holding your smartphone in your hand, the BPM of the music will change depending on the speed at which you wave your hand.
Create Tempo
If you press the Start button and tap the Tap button at your favorite tempo, the BPM of the music will change according to that tempo.