Fella's..............you dont have to by a call for it, you can do it yourself. Ill try to explain.....BREATH IN WITH YOUR TOP LIP AGAINST YOUR TEETH,
AND THEN BLOW OUT THROUGH YOUR TEETH AND TOP LIP. IT KINDA SOUNDS LIKE A HOT AIR BALLOON WHEN THEN AID FLAME TO THE BALLON.(if you can hear that sound in your head! lol) I stalked a decent sized buck accidently when walking back to my uncles stand and he communciated to me with had gestures that a buck was bedded down in front of him in a honeysuckle thicket. It was a real windy day, and evey time the wind blew i took a step, i closed in and wanted to do a snort wheeze to get his response...........the buck stood up laid his ears back and started to circle me, then he winded me and was gone!! My uncle said it was like watching a hunting video it was cool. Larry Weishun, does it with his mouth also, that is where i learned it from.