which is rakshas into the third hole down if you plug the other holes just below warm air and there you are warming that no that is so when you're warming up a whistle from the top of the bottom  it's really warmed up when this area is warmed based whistles are voiced and tuned at a particular frequency in this case a d you were so you wanted to be tuned in to a for a based on a four forty so that when you instrument and although by that time theoretically the whistle is slightly out of tune with itself and you won't hear it within those within the smaller ranges we're talking about the other advantage is that when the weather gets very hot whistles tend to go sharper and you need to be able to pull it out to get it to play at a four forty sort if the tuning slide is not only for tuning to other instruments that are pressure it takes or amount of air it takes to get a clear note versus when you've got too much pressure wants to break and start doing weird things is fairly narrow it's not it's not supernatural but it's kind same figure here london philharmonic pictures around a four fifty two hotel and differ different orchestras are different organs were tuned to different pitches of different frequencies all of what they called a was different all over the place guys from the country next door want to order no ball he makes in the same overall you know this is way too flat we need a shark so he had to really remake the whole wall is like hugo of the whole positions everything were different this  ever they're doing to and they're not necessarily some of them will again can play with a full forty and some of you can you see a lot of old flutes and so on that will be marked lp which means low pitch can it's not necessarily baroque pitch but it was a pitch that some makers started making instruments as well ever they were in lower pitch let's use the a four fifteen and say they more or less borrowed that as a standard as well because they were all over the map that i would posit is my experiences teaching record in teaching clarinet to elementary kids is that i came up with loose lips tight  lips instruction to get them to understand what it was very interesting actually get around it to all the different musical instruments and play and be in an orchestra and on the recorder the first class got a half step just different from tightening their notice the part of all of these are this and we don't have another standard whistle but they're quite a bit larger take it for me than most whistles know why difference i notice all these not all old positions put off the same more and that has a great deal to do with sound reaction it does indeed have to do with how they work and that's the thing that generates the sound here we're where the whistle when you blow through it the wind splits either against another piece of wood or a piece of plastic or something the slaps against a couple different kinds of reeds or as in the ball of grasses the lips are held inside of a circular or with a mouthpiece it's called and that portion europe's inside the mouthpiece makes the then basically that's what you do is it makes the raspberry sound that and that that sound the the in within string instruments it's the body of the instrument that causes the the the gives the sound the string alone just standing out on a border and free air doesn't have much sound sort of takes a wooden accordions and they know that reed does not slap against itself for another thing it's weight sort of very tiny opening back and forth and it's called a free reed because it's it's doesn't vibrate against anything but it