It is stated the slides have to be in a specific "Digital Format" what format is this ?FotoMagico provides quite powerful slideshow creation from photos (or scanned slides) and with audio/music. It's not cheap, but can create impressive presentations. Whether it can be considered worth the value compared to iMovie (which I agree works fine and you already have) depends on how regularly and what events you night be making slideshows for.
It is stated the slides have to be in a specific "Digital Format" what format is this ?
It is stated the slides have to be in a specific "Digital Format" what format is this ?
Now I have got the JPEG slides into iMovie OK, I cannot however add background music."Digital format" is any image format, JPEG is probably the most common but could for example be GIF, TIFF or PNG. As was said above you need to get the physical slides scanned, then whatever digital image format the scanner can save as should be useable to then make a slideshow movie
Both FotoMagico and iMovie can then accesses pictures from iPhoto or Aperture libraries (not sure about new Photos app library as I don't use it), or directly from wherever they have been saved.