Thursday night wasn’t the first time that the Dirty Projectors have ever played the Black Cat, but it was possibly the first time that a lot of those Black Cat patrons had seen the Dirty Projectors. That the band has raised its profile in the wake of album-of-the-year contender Bitte Orca was not lost on the musicians, as they alternately rose to the occasion and second guessed their decisions. Not two songs after singer/multi-instrumentalist Angel Deradoorian victoriously proclaimed, “We finally get to play upstairs,” singer/guitarist David Longstreth pondered aloud whether the group’s mixture of acoustic and electric instrumentation on “The Bride” was actually working live. Despite audience assurances, he seemed unconvinced.