Each question has four answers. Every answer sits on a note. Work out the right answer, then find its note on your guitar and hold it to lock in. Faster = more points.
Nothing is recorded or sent anywhere. Your device listens through its microphone, works out which note you played, and throws the sound away.
Tip: tune up first, find a quiet spot, and don't play music through the speaker. A guitar plugged into an audio interface works best.
Play a character's note and hold it to lock in (or just tap one)