Chords for BTS - The Truth Untold (전하지 못한 진심) (feat. Steve Aoki) (Color Coded Lyrics/Han/Rom/Eng) (). 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|BTS - The Truth Untold (전하지 못한 진심) (feat. Steve Aoki) (Color Coded Lyrics/Han/Rom/Eng)