So Sinta teaches overtones one mode at a time. On page 23 he is working the 2nd mode and in ex. 7 he runs up the 2nd mode above Bb1, B1, C1, C#1, D1, D#1 and E1. All of those are pretty easy for me except the the 2nd mode above E1. I can't even get a hit of that high B. He says to vent the Eb key in order to get it. Does he mean the right hand Eb key or the left hand side key. Neither seems to do anything. If you use the right hand Eb key that you are trying play the 2nd mode of the E1 above the the Eb1 which makes no sense. What gives?