don't think this has been covered before ... excuse if it has ... good tip for basslines and drums.
let's take a kick for example:
3 voices. 1st contains mono kick as you would normally process it (as long as it's panned center). 2nd contains same kick sample detuned by +1 cents (or whatever) and highpassed to ~1000Hz (or whatever) and panned -64. 3rd contains same kick detuned by -1 cents (or whatever as long as its diff than the first two) and highpassed to same amount as second and panned +63.
There's lots of room for experimentation within this basic contruct.