My bard/ranger in Kingmaker has decided he wants a class that specializes in bardic music, so I did some digging and found the Virtuoso. The class as written in Complete Adventurer has the right flavor, but it both feels a bit weak and has a first level ability completely obsoleted by Versatile Performance. So I decided to rewrite it more or less from scratch, using a variety of sources for inspiration (including the NeverWinter Nights Players Resource Consortium's version of the class).
My results are here: Virtuoso.
So I'm looking for some feedback, mostly from a balance point of view; I am pretty happy with how the flavor of the class turned out, but I'm not sure how over/underpowered it might be and I doubt I got it right on the first try.