To add audio to a post, follow these steps:

1. Click the post creation field (where it says "What’s on your mind?").
2. Select the "Add Audio" option.
3. Choose one or more audio files from your device (up to 10 tracks per post).
4. If desired, also add photos to the same post.
5. Select the post privacy level — "Public", "Friends", or "Only Me".
6. Click "Publish" or "Schedule" for delayed posting.

The uploaded tracks will appear in your feed as an interactive audio player, so users can listen right on the page.