(Music Minus One). Johann Sebastian Bach’’s spirited F-minor concerto is wonderfully compact, of a manageable length for the student player, and displays all the wonderful qualities associated with the granddaddy of the keyboard. Great fun to learn and play! Its companion in this book is a concerto long attributed to Johann Christian Bach, but now proven to belong to one of Bach’’s lesser-known sons, Johann Christoph Friedrich Bach, who was a skillful composer, as this marvelous gem will testify. It is perfect for the beginning student, a wonderful preparation for the Mozart concerti. This Music Minus One pack will let you play the piano with the Stuttgart Symphony Orchestra backing you up! Audio is accessed online using the unique code inside the book and can be streamed or downloaded. The audio files include PLAYBACK+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, and pan left or right.