How Do I Do That in Photoshop?

Add Background Music?

In the Timeline panel, right under your clips, you’ll see an empty track. That’s the audio track and, right under the little filmstrip icon (that we use to open more video clips and photos), you’ll see a little music notes icon (circled above). Click on that icon, choose Add Audio from the pop-up menu, and then choose the audio file you want to use as your background music (Photoshop supports most common audio file formats, from AAC to MP3). Click Open, and that file is added to your audio track (it appears as a green track). ...