Thirty-second notes, like eighth notes and sixteenth notes, are binary figures that you will hear constantly in all types of music and this will help you to grasp this figure, but the most important aspect in this type of exercise is the combination of hands and feet. Be careful. With this type of figure there is always a tendency not to pay too much attention because of how familiar it sounds, but once you begin to read one bar after the other (without stopping), you will find that co-ordination between your feet and hands sometimes fails, particularly in maintaining the HiHat. Most of the students who have practised these exercises have found them to be practical and effective when playing different patterns. In this type of exercise it is very important to work at slow speeds at first to control all the strokes and the co-ordination of hands and feet. Listen closely to the metronome so that you can read all the bars without having to stop. This takes some time to get used to. Be careful to avoid mordents. Be very exacting with yourself in your first steps. Then lower the speed by 5-point intervals until you reach 40. Once you have done this you can increase the speed until you reach your limit.