HELP [Which app will allow you to make a photo (picture) slideshow with music?]

All apps in the Elements range can add music to a slideshow (as well as Photoshop or Lightroom).

Your choice will depend on what you want to do.

1 - While organizing your picture in the organizer, you can select a number of pictures and display a simple slideshow with music. You can choose the music, but you can't choose effects and you can't save the slideshow for use on another device. You can choose the display time for the frames. It's in the menu 'Full Screen mode', shortcut F11.

2 - With Photoshop Elements, you can make high resolution mp4 videos. You have a choice of several 'themes' to create automatically those videos. The result is generally impressive and avoids the usual boring homemade slideshow effect. You can choose the themes, arrange your frames order, select music add text frames... but you won't be able to 'customize' the slideshow with transitions or frame duration.

3 - For full customization, you need Premiere Elements. It's very powerful and flexible, but be prepared to take the time to learn the software. You can create slideshows from videos or photos.

Premiere Elements