1. Open the Tik Tok, click the "plus sign" at the bottom, and click "Upload" to select the videos in the album.

2. Click "Volume" to eliminate the original sound, click the "√" icon and select "Select Music".

3. Click "Use", click "Cut Music", drag left and right on the sound spectrum below, cut the required music, click the "√" icon, and click "Next".

fourth, in general, summary 1 is as follows:

fifth, summary 2 is as follows: