Jhaelen said:
Anyway, I wouldn't have a problem with the effects of several different bard songs from stacking.
I don't think anybody is questioning the stacking ... Just to clarify, this is what's under discussion. If my bard starts singing on round 1 of the combat to inspire courage, that effect boost his allies for as long as he continues the song and five rounds after. In the second round, the bard doesn't need to spend an action to continue the song, but there are things he can't do. If he attacks with his bow, for instance, the song can continue; but if he casts glitterdust, it ends, and the five-round countdown starts.
The question is, what if his choice of action in the second round is to start an inspire greatness bard song? There's no question, as I said, about the effects stacking--the bonus types are clearly called out in the descriptions of the abilities. What we're wondering about is whether this action ends the inspire courage song and starts that five-round countdown to the end of the effect, or if the bard can continue both songs at once. The pro is that 'using bardic music' is not on the explicit list of things you can't do while maintaining a bardice music effect. The con is, as far as I can tell, that it's just obvious that you can't sing two different songs at once. Which is probably true, but that doesn't mean it's the rule.
It doesn't seem like it matters. The above sequence is kind of the standard sequence for my current bard. Round 1: buff everybody with inspire courage. Round 2: buff the psychic warrior with inspire greatness. If the first bardsong ends when the second begins, then in round 6 we'd be losing the inspire courage buff; but usually, our actions in round 4 or 5 are 'loot the bodies', so who cares? But in those rare situations where we know well in advance that a combat encounter is about to start, then along with all of the regular pre-encounter buffs, we could start the fight with everybody under the effects of every song I know. Sure, that burns up a lot of my daily uses--but I never run out*, so why not? Especially if it means that round *2* is 'loot the bodies'.
Honestly, I'm not even going to ask my DM about this. He'd just laugh his butt off. RAW or not, it's mad unbalanced, I think ...
*2 Extra Music feats. Bwah-hah-hah!