The most common harmonica tuning is called "Richter," followed by the "Country Tuning" that differs on hole 5 draw, where you discover an F sharp in place of a natural F note. There are also some minor tuning, such as the natural minor and harmonic minor. Some manufacturers also produce custom tuning (like Seydel) along with other special tunings. Among those, you will discover the melody maker by Lee Oskar and the Powerbender.