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Overdraws
Overdraws are difficult mainly because the short high draw reeds are difficult to choke.
If you isolate the blow reeds you will find that its not too difficult to get them to sound when drawing on them.
The problem is choking the draw reeds. The draw reeds have to be set up very tightly in order for them to choke well.
Because of their smaller length to width ratio they have a greater tendency for torsional vibrations.
I usually need a lot of trial and error to get the high draw reeds set up well.
If the reed is set up well the overdraw is played exactly like any other overblow, from the back of the tongue. The tip of the tongue should be relaxed.
Again the important thing to remember is that the draw reed should stay choked, concentrate on that.

 
Draw to choke to overdraw
User Contributed Notes
 
03-07-2009 21:07
Tinus
You can't overdraw hole 4. What happens is this: you bend down past the lowest pitch the reeds in the hole can produce. At this point the reeds want to choke but since you are still putting a lot of energy into the reeds this energy (airflow) has to go someplace. The only possible way out is through torsional vibration of one of the reeds. This produces a high pitched sound and will very likely damage the reeds. The same torsional vibration often occurs in overblowing. See the item "waxing the rivet end" for more information.
03-07-2009 20:42
Adam
Hey, I have a query...I'm not sure if i'm overdrawing on the four or not but i bend it down pretty far and then it gets really high pitched and if i get it just right it makes a new sound that's pretty clear...but sometimes it just gets really, really high pitched and then makes this clicking sound and i'm not sure what it is...any help?
27-11-2007 18:02
Tinus
Hey Boster,

De hoge toon die je hoort is een torsie toon en het is niet de bedoeling dat je die hoort. Er zijn een aantal oplossingen voor; bijenwas, nagellak en turbotape zijn de bekendste. Kijk op deze pagina: http://www.overblow.com/index.php?menuid=140 daar beschrijf ik de methode die ik gebruik.

The squeek that the Lee Oskar produces is a torsion vibration. It is not desirable, but there are several ways to fix it. on this page is the fix that I use: http://www.overblow.com/index.php?menuid=140

27-11-2007 16:38
boster
Hey,

Choking the drawreeds on my lee oscar is very easy, though it usually starts making a very high tone, so high my mom cant even hear it.
Is this ok? or should i try to keep that sound choked to?
Its not that its bugging me, I'm just wondering if I'm using the right technique.
I hope the question is clear, i have a poor english grammar (I'm from flemish belgium)
Anyway, THX ALOT for the site, it helped me a lot!
02-02-2007 16:04
Tinus
Start by gapping the drawreed so close that it won't play at all. That way the overdraw should be very easy, if it isn't then it is your technique that is at fault and not the gapping.
After that slowly increase the gap untill the drawreed can just be played normally.
It might take a few try's before you get it right.

A very closely gapped drawreed can be difficult to get to sound, but with practice you will learn to resonate with the reed so that it will start sounding even when it is gapped very low.
27-01-2007 17:42
Rafael
Hi Tinus!
I am experimenting with those modifications and I am getting very good results! Thanks!
Do you have any tips on setting up the high draw reeds? I am trying to do my best but i still cant get overdraws or overblows from reeds 9 and 10.
Thanks again.
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