Chords for Sirvan Khosravi, Mehdi Emaadi - Bargard - DrumCover (سیروان خسروی - برگرد - کاور درام) (). 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.