I only see the ability to do 4 tones in a song is this a toolkit limitation or a rocksmith limitation?  I have a few songs that would be fun to do but have more than 4 tones.  I know its pretty rare so not really a big deal but it would be fun to be able to do more.

What amount of tones yo'd like to have?
I see one hack that could increase # of tones to 5 but with one limitation, you couldn't change to starting tone again.

So it's basically RS2014 limitation, It has only 4 tones, but as for SNG it's format allows us use maximum # of tone change that int32 can handle + same for ID's you could get 65536 unique tone changes once or so :D

As for the RS2014 tones system, I'd like to know is there possibility to at least double or unlock this limit for auto-tone switcher.

5 or 6 would be great one song had 7 but only saw that once.  The songs I see this in generally only use the tone for one part and then change to a different tone each time without really reusing the tone again.  

For now I'll add issue on GH to bookmark things, so I could investigate is it really possible and what e should change to allow this.

But as for now we state it as: "NOT CURRENTLY POSSIBLE" :(

Thanks I appreciate the response its not really common so not a huge deal just wishful thinking.

Here is issue https://github.com/rscustom/rocksmith-custom-song-toolkit/issues/209

Hope someone else could investigate too, If i fail :D