The clarinet finger explains that the clarinet is a closed column at one end, while saxophone is a cone. Form is directly reflected in the clarinet in addition to the sound tube, almost straight, and saxophone is fine and thick. For wind music, this brings a core difference: the former is 12 degrees and the latter is 8 degrees. With regard to the basic concepts of column tube, cone tube, overtone and even wave abdomen, it is worth noting that the concept of "overtone" has different definitions in different contexts of physics and music, especially in wind music, the overtone on timbre, the overtone used in conventional treble playing, and some of the so-called overtone definitions of timbre substitution are more confused, which can be ignored first and understood from the physical overtone. Because the oboe is significantly stronger than the odd number because of the even number of overtone (especially the low frequency), it has obvious timbre difference with the saxophone with relatively linear distribution of the overtone series. Most woodwind instruments obtain about an octave by opening holes, and then use this octave's first overtone to form the second octave, and if it can be further up, it may use the third or fourth overtone. The clarinet finger is easy to learn and has a diagram.