Hi all, have been doing a bit of reading recently about Arnold Jacobs and his teachings about breathing and air support. His innovation in teaching, it seems, was to introduce breathing devices into his teaching methods and into the practice routines of his students. Does anyone have any experience of using such devices? Here's a few that Wind Song Press sell (a company that specializes in Arnold Jacobs, it seems). A wind bag [I know lots of these!] Apparently, blowing a ping-pong ball up a tube is a useful exercise A Voldyne...used for measuring and increasing lung capacity (apparently, most people only use 50% of their capacity) More ping-pong balls...but there are three this time, which will no doubt make you three times the player! Anyway, has anyone ever used one of these, and, if so, did it make a difference?