Johann Friedrich Burgmüller (1806-1874) settled in Paris and his light and intimate playing style won popularity in the salons of the day. His Opus 100 pieces are perennial favorites of students and teachers. 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.