The answer is "sort of" - there is only one main audio track (we have requested multiple tracks, but not yet). What you can do to accomplish sort of what you want is have your main audio track then put an additional audio clip (or more using multiple slides) attached to a slide. You can use the "offset" parameter to move that clip location relative to the start of the slide. Using that method (and playing with the offsets) you can actually combine a number of audio "clips". The best way though for combining multiple audio if it is not just the occasional clip on a slide is to use an external audio editor to build your track the way you want it. Audacity is free and works quite well.
You can't have too many gadgets or too much disk space !!
mikey (PSP6, Photoshop CS6, Vegas Pro 14, Acid 7, BluffTitler, Nikon D300s, D810)
Lots of PIC and Arduino microprocessor stuff too !!