You can use Format Factory to edit. The specific method is as follows.

Tools/raw materials: Format Factory 5.6.5, Dell xps15, Windows 10 Home Edition

Steps:

1. First open Format Factory.

2. Then click MP3.

3. Then add files.

4. Select a piece of music and click to open it.

5. Then click Options.

6. Then select the start time and end time and click OK.

7. Finally, click Start and wait for completion.