The steps for cutting excess music in Douyin are as follows:

1. Open the Douyin app, click the " " icon, and switch to the creation page.

2. Click "Album" on the lower right and select a video.

3. Click "Select Music" at the top of the page and select a soundtrack.

4. Click the scissors clipping icon on the right side of the music, move the audio left or right, and select 15 seconds of audio.

5. Click the "√" icon to cut out excess music.