I don't think circular breathing is the goal. It's just a means to an end. The goal is strengthening the muscles that keep the airway open. The resistance from

I don't think circular breathing is the goal. It's just a means to an end. The goal is strengthening the muscles that keep the airway open. The resistance from blowing into the didgeridoo seems to be what does that. I have no idea how that compares to bagpipes, however.