1. Click on "Start" to set all values on default.
2. Upload an mp3 or wav audio file of your choice.
3. Click on "Play" and tap the tempo with the spacebar.
4. optional: View data in the plot or - if you like to tap again - reset tappings with
5. Click on "Show JS Arrays" or "Export CSV", to show the recorded data as Javascript arrays or to export them as a CSV/Excel file.