Chopin's music is frequently played with <answer>rubato</answer>, "the practice in performance of disregarding strict time, 'robbing' some note-values for expressive effect". There are differing opinions as to how much, and what type, of <answer>rubato</answer> is appropriate for his works. Charles Rosen comments that "most of the written-out indications of <answer>rubato</answer> in Chopin are to be found in his mazurkas ... It is probable that Chopin used the older form of <answer>rubato</answer> so important to Mozart ... [where] the melody note in the right hand is delayed until after the note in the bass ... An allied form of this <answer>rubato</answer> is the arpeggiation of the chords thereby delaying the melody note; according to Chopin's pupil, Karol Mikuli, Chopin was firmly opposed to this practice."
Chopin's compositions are often played with what?
rubato