Here’s a short walk in Sonic demonstrating some Sonic sound design concepts. In this case, adding some articulations to some string staves and layering up some stuff.
Here’s one showing how to forge a 12 string guitar out of two 6 strings. Note, that’s before the free Sonic SE allowed us to edit the 4 layers. Now you don’t have to use multiple channels/slots, but could it get to fit on multiple layers in a single slot. Still, it gets around an older version of Sonic and demonstrates how you can layer up slots, transpose, keyboard spit, etc.