Can't get this riff out of my head... "ta ta ta ta, ta ta ta ta, ta ta ta taaaa dum".  What could it be?  It's gotta be Beethoven.  It's not Beethoven's 6th Symphony. "ta ta ta ta, ta ta ta ta, ta ta ta taaaa dum". Looked at all his symphonies. Not any symphony. But it's so symphonic! Hmmmmm... maybe it's a piano concerto. Poked around Beethoven's concertos. Ahhhh yes here it is: