Chords for KUAIZERO 老高一百萬訂閱回顧！彩蛋 | 題外話 | NG | Memes梗 | 誤w (). Spark is the smartest and most interesting app to learn and enjoy playing guitar. Spark is an all-around app for beginners and advanced players to learn any song with chords or master new skills with hundreds of lessons and games in Spark.