I have heard that an alternative way to learning the yodeling technique is to stand in a #2 washtub full of extremely hot water, whilst at the same time dropping 10 to 25 pound rocks, (cement blocks will suffice if rocks are unavailable), on ones feet. The effect will last longer if the washtub is strategically placed over a roaring fire. This method can be used by those folks who cannot read music nor have any idea what the pitch of certain keys may be. I assume that various weights of rocks or stones will give different pitched sounds to the yodel.