Adding music to IG Post is a new feature on Instagram in January 2022. So, if you want to add music, you must update your Instagram first. Then, you can follow these steps to add music to the IG post easily.
1. First, open your Instagram and tap the plus icon, and select Post.
2. After that, choose the picture you want to post and tap the arrow on the top right corner.
3. Then, set the filter for your post and tap the arrow on the top right corner.
4. Next, tap Add music.
5. Then, choose the music you want.
6. Next, set the music and tap the check icon on the top right corner.
7. Last, tap the check icon again to post your picture.