Of course there are limitations, which are mainly determined by the expressive power of the blues harmonica. You must know that the blues harmonica only has more than 20 tones, and semi-tones need to be pressed. No matter how hard you practice, it will not work. It may be too accurate, the airtightness is not very good, and there will be a lot of noise. Each harmonica has only one tune. Professional players will buy seven harmonicas tuned by CDEFGAB. When playing difficult music, they have to change them constantly, which is very difficult. Trouble, you can imagine its expressiveness. The blues harmonica, as its name suggests, is most suitable for blue dot music or some foreign folk songs, such as Irish, because of its timbre. One of the great features of the blues harmonica is that it can It can produce many special sound effects that other harmonicas cannot do but are needed for blues. For details, you will understand by watching the videos of those masters playing