After initialisation of this webapp you'll see a button 'high lighted' in each of the top 2 button rows. These are presets to enable the app to play a note or sequence immediately when you click the button ´Play´.
To hear the note or sequence click button 'Play'. As a reference there is a note given on the left button, bottom row.
Three notes or sequences are shown, and the choice 'None of the above'. Pick one of three, or the 'None of the above'. After you've chosen, the correct choice will 'light up'. When it is the 'None of the above' this choice will show the note or sequence when you click it again. You may now review all the shown notes or sequences by clicking them -again-
To generate a new note or sequence type, you click on either of the 3 voice buttons; or -when reviewing your note or sequence choice- you can click 'next' or either of 3 instruments. When you've not yet chosen which note or sequence you think correct, these buttons will replay the active note or sequence.
The bottom line will show your score. The first value shows correct choices, the next -in red- shows arror score. The percentage tells your overall rating. The buttons start, stop, reset, and save start the 'game' or hold it, and you can save or reset your score.