Artsy types are not like other people. I’m allowed to say this because I’m one of them, or was for many years before I gave up performing for writing (though to be honest, writing still counts as artsy, just in a subtler way). We’re dreamy and passionate, prone to being swept away by our art, often accused of having our heads in the clouds, and our instructors are no exception. You’ll get a front row seat to what it’s like to attend a class focusing on honing an artist’s performance with “Piano Talks’ ” second episode, which might take you back to band or choir if you were a music geek like me. “Master Class with Victor Rosenbaum,” definitely took me back to my years of tutelage under Mrs. Baker, the local piano teacher. Rosenbaum’s humming along to the music in particular instilled a sense of déjà vu, though his …