Gradual fade instead of split

So I'm having trouble wording what I want to do, but here goes: I'm making a patch that takes input from my iPhone's compass via c74. It plays a set of random notes in a certain key, with the key changing depending on the direction the compass is pointing (ie North is C, East G, etc). The compass spits out a float in the range 0-360, and right now I have 4 "split" objects, one for each direction (0-90, 91-180, etc) that parse the incoming number and route it to the proper key.

This works ok, but I'd like to be able to have it gradually fade from key to key. So maybe, if North (0-90) is C, the 70-80 range starts pulling some notes from the next key, and 80-90 pulling even more notes, and then decreasing the frequency of C notes as it passes over 90. Hopefully that makes sense, anybody have any suggestions? Much appreciated.