How to play chromatic scale on blues harmonica

It is difficult for Bruce to play semitone. Using the position of tongue and lips to make reeds with different airflow friction (that is, what experts call bending technology).

Also, blocking the hole by hand ~ ~ This is too ~ ~ obscene. I suggest you use the old-fashioned single-tone method, with only one hole. Or a new game (including holes, blocking the other holes on the left with your tongue, leaving only one hole) to see which one suits you.

If the landlord has a high demand for semitone, you'd better buy a chromatic harmonica with a hole of 12. The hole is big, it is difficult to play a single note, and it can also meet your needs of playing a semitone.

There are many online tutorials, so you can check it out.