I can't speak to your audio software but for video editing, Adobe Premier likes to use a "scratch disk" for temporary files; this comes from users we have built for asking em to put in one, not from persona;l experience using the software. The SSD works like this.
The drive decides what gets stored where ...so let's say you have a 2 GB files and you start working on it today.... it will note that you loaded "Jack's Karaoke 2007-01-10" today at 10 am... when you load it again at 2 pm and again the next morning, it's logic goes that way of "I'm noticing that Astra likes to load this file frequently, why don't I move it to the SSD portion of my space and help him out w/ loading times a bit".
Going back to the video processing analogy, you can look here and again see a much lesser advantage (lil over 5%) over say a WD Black.. other uses:
4% in Windows Media Center Performance
3% in Adding music to Windows Media Player
411 % in application loading
So obviously, loading the program will happen much faster .... as for how the software "does it's thing", I just don't know ... if it creates loads of temporary randomly named files, then there will be an advantage but likely in the single digits.