In the audio playlist linked below, we take a piece by Mozart and 1) Fix the melody line (the first track). 2) Fix the rhythmic (or timing) information of the remaining three tracks to that of the original midi file (last track). 3) Select the pitches of the remaining tracks conditional on the above (second and third tracks); one example uses conditional sampling with our particle filter, the other using conditional probability maximisation with a beam search, giving two different styles.