As such, musicians who play these instruments are trained to read three staffs of written music: a treble staff for the right hand, a bass staff for the left hand, and, a staff for the feet playing the pedals The music is played exactly as the composer, (Bach, Brahms, Beethoven. Huge church organ Learn To Play Church Organ From A Pianist’s Background The church organ is an instrument that most people come to already having had some experience on the piano.