What is the best way to "combine" 2 digital files?
I have a client, day spa owner, that wants white noise played in the background, with wind chimes as an overlay. This will be a looped mp3 file, played in the massage area of the day spa.
What programs could be used to create something like this? There is a good chance he will want to add or change compilations at different times, so having a program for this would probably be better than sending out for it every time.