Tobold Hornblower said:
A perform check determines how well you entertain, not how good you are with a guitar.
A great Bard might start playing his guitar, look around the room, see that everyone is bored with guitar, and switch to telling jokes. The Perform skill determines your overall ability to entertain by any means possible. Each type of entertainment is just for flavor.
This is, perhaps, the best post in this entire thread. It gets to the core of the situation and pulls the wackiness together.
If I were to try to simulate focused mastery in a specific instrument that would approach the scale of a contemporary virtuoso I would probably make it a Craft skill or something similar. Each instrument would be a separate craft aimed at making music (the product of the craft).
Really think about the whole idea of perform: most musical instruments require more dexterity than charisma (Stephen Helfgot--I think that's right) was certainly not a charismatic man but he was phenominal on the piano, if I were to apply a stat to singing it would probably be constitution--breath control is critical and can be exhausting to maintain. Each form of artistic expression works very differently from the others.
BUT
A great performer, once they pick them up even to the smallest degree, can use any tools that he has to wow and audience. As a teacher, I use my minor training is about a dozen forms of performance (writing, poetry, oratory, singing, jokes, etc) to keep my students' interest and help them learn.
thanks Tobold. Until you said that, I was ticked at the perform skill. Now I get it.
-DC
and ps, while historical "bards" do not look anything like what has ever existed in D&D (not even the vaunted 1e bard) the word has become conflaited with troubadour, the travelling gossips, teachers, and entertainers. Most people who use the word today are not referring to the ancient Celtic priests...nor would they recognise an example of one if they were shown it.