there were a program for dj's but it was based on loops, the program consists on two big circles with button circles on each circle in order to activate a loop, then a hardware tablet with those circles were sold for the pcs, it program was very famous but I forget the name, do you remember the name?
I believe you are looking for Fruity Loops Studio 4.
I found a cd that my aunt gave me because she had old apps since 1997 so the name is mixman thanks to all you