Chords for Avengers: Infinity War - Official Trailer #1 Music (2018) - FULL TRAILER VERSION (). 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.Spark Chords|Avengers: Infinity War - Official Trailer #1 Music (2018) - FULL TRAILER VERSION