You need to use a third-party input method.

The specific steps are:

1. You can download an iFlytek input method. Then click anywhere to open the typing pad.

2. You can download an iFlytek input method. Then click anywhere to open the typing pad.

3. Click Tools.

4. There are more functions in the tool. Open more functions, and there is a musical keyboard inside.

5. Then download the music keyboard and open the music keyboard.

6. Then you can download your favorite music keyboard sounds in the music keyboard.