After initialisation of this webapp you'll see a button 'high lighted' on the top 2 button rows. These are preset choices to enable the app to play a chord immediately when you click the button ´Sound´.
To hear the active chord click button 'Sound'. You can hear it 'broken up' with the button 'Broken'.
Three chord descriptions are shown, and the choice 'None of the above'. Chose one of these three, or the 'None of the above'. If your correct this chord ( or choice ) will 'light up'. When it is the 'None of the above' this choice will show the chord description when you click it again. You can also review all the shown chord descriptions by clicking them -again-
To generate a new chord type, you click on either of the 3 voice buttons; or -when reviewing your chord choice- you can click 'next' or either of 3 instruments. When you've not yet chosen which chord you think correct, these buttons will replay the active chord.
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.