Because in the saxophone family, the E-flat alto should be said to be the most widely used and universal one, because its actual pitch, range and timbre are closer to human voice, singing and lyrical, and more stores express different styles and emotions, so it is more inclusive and representative, which is the main reason why it becomes the first choice for saxophone beginners.

1. is whether the thickness and strength of metal are enough to ensure that the instrument is not easy to bend and its mechanical properties are good. Under normal pressure, the keys should not be bent.

2. Whether the cushion is installed properly and whether the marks around the cushion can be accurately covered and affixed to the center of the sound hole.

3. It is whether the tension of each key is the same. If the spring is too soft, the keys will rise and fall slowly. If you push too hard, your fingers will push too hard and become stiff, which will affect the playing effect. The distance between the keys and the sound hole should be consistent, too low or too high will have a direct impact on pronunciation.

4. There should be no gap between the key post and the connecting rod, because any gap will prevent the cushion from covering the hole evenly.

5. Then the most important thing is to check whether the timbre is beautiful. Saxophones with different prices have different timbres.

6. Try again whether the treble is bright, whether the bass is easy to blow and whether the pitch is good. Some instruments are mostly inaccurate in the high notes.

7. Everything is normal, and then see if the accessories are complete (some are equipped with whistles, spare flutes, hanging belts, etc.). ).

8. With the help of professionals, check whether the relationship between musical instrument pronunciation and pitch and interval pronunciation is correct.