[bonk~]'s help patch says that right-hand outlet is "the 'cooked' output which gives only an instrument number (counting up from zero) and a 'velocity'."
But I'm getting a list of three numbers: instrument number, and two things, one of which is the velocity.
For today's work, I'll assume that the second number is the velocity. But I'm awfully curious what the other number is. I couldn't figure it out from the source either.