Can the guitar pin be modified and heightened by itself? The sound won't affect too much, but it can also reduce the strength, novice, don't joke. ...

The height of the pin has no effect on the sound. But most people think that the pin is too high to affect the sliding string. Why do you think of heightening the pin? If it's a stringed instrument, go to a musical instrument store or someone who can tune it for you.

Good piano feet are made very low. Didn't you ruin your own piano by doing so?