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 Forum: The Chiff and Fipple Whistle Forum   Topic: TWCALC - Tin Whistle Hole Calculator

Posted: Mon Jan 16, 2017 11:34 am 

Replies: 0
Views: 575


TWCalc - Tin Whistle Hole Calculator has been revised to fix a glitch in the L/B Ratio calculation. Other minor improvements as well.

Version 3.31 can be downloaded here: http://kingsmills.us/twcalc/twcalc.htm

 Forum: The Chiff and Fipple Whistle Forum   Topic: Got my own whistlesmith!

Posted: Sat Mar 26, 2011 9:16 am 

Replies: 14
Views: 1839


... than calculators come up with. The variations in Fipple design throws a wrench at a lot of calculations. Once you trim the body note into tune, TWCalc and other programs mentioned (I wrote TWCalc) will find the drilling centers of the holes for you. Hole measurements are taken from the bottom ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: whistle makers: new flutomat implementation

Posted: Thu Jul 16, 2009 6:00 pm 

Replies: 50
Views: 6358


I have the TWCalc source code available as well. I call it "Open Source Whistlemaking". On the cutoff graph, I found the use of a "Cutoff Ratio": Cutoff / Frequency a good way to determine the quality of the ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: whistle makers: new flutomat implementation

Posted: Thu Jul 16, 2009 3:45 pm 

Replies: 50
Views: 6358


I may take a look at it and see if I can put some of this into TWCalc. Nice thing about the C language code is that the interative functions can run longer instead of a fixed set that the spreadsheet does. How does your embouchure hole/window formula come ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: TWCALC - Latest Update 8/8/08 Version 3.2

Posted: Fri Aug 08, 2008 10:51 am 

Replies: 0
Views: 819


I've made some modifications to TWCalc, Tin Whistle Tonehole Calculator Version 3.2 for Windows You can download it here: http://www.tinwhistles.us/twcalc.htm A link to the Instructions are there as well. You can also download it from this ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: Whistle finger holes

Posted: Tue Jan 08, 2008 10:17 pm 

Replies: 9
Views: 2605


http://www.kingsmills.us/flute-diatonic.xls

Actually, I have a new spreadsheet that is more accurate than TWCALC. I will be updating TWCALC shortly.

 Forum: The Chiff and Fipple Whistle Forum   Topic: Whistle making Where will this madness end

Posted: Sun Dec 16, 2007 9:26 pm 

Replies: 16
Views: 2798


... program considers the bore diameter information and the toneholes. I make a lot of unusual keys that go beyond the simple percent formula. Also, TWCalc and the new spreadsheet have Cutoff Frequency / Frequency Ratio information to help predict the quality of the tone. To answer the earlier question, ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: Whistle making Where will this madness end

Posted: Tue Dec 04, 2007 5:57 am 

Replies: 16
Views: 2798


... for easy reference. I've had some nice comments on the improved tuning from various customers. When I get time, all these changes will go into TWCalc. Send me private message or email and I'll send you the Excel sheet. If you don't have Excel, you can open it using OpenOffice, a free product ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: Playing Klezmer with a tinwhistle

Posted: Sun Jun 24, 2007 9:45 pm 

Replies: 21
Views: 4677


You can get brass tubing from specialshapes.com or a local Hobbytown store. And yes, the TWCALC program will do a six hole verision of the Ahava Rabba mode. However, it is better to have that mode in seven holes simply because a lot of Jewish music (and Arabic as well) ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: Revised Whistle Tonehole Calculator Spreadsheet

Posted: Wed May 30, 2007 4:58 pm 

Replies: 1
Views: 550


... as other sheets do and the high notes are not too sharp. After these new formulas are tested more and proved, they will eventually be put into TWCALC. http://www.kingsmills.us/flute-new.xls

 Forum: The Chiff and Fipple Whistle Forum   Topic: TWCalc Manual

Posted: Sat Dec 10, 2005 9:24 pm 

Replies: 19
Views: 2190


N4VGM DE KA8ZPL

Yes, TWCalc is for very dangerous people. I have a whistle and I'm afraid to use it.

 Forum: The Chiff and Fipple Whistle Forum   Topic: TWCalc Manual

Posted: Sun Dec 04, 2005 8:14 pm 

Replies: 19
Views: 2190


The TWCalc program is a windows program and it is zipped. You have to unzip it first.

 Forum: The Chiff and Fipple Whistle Forum   Topic: TWCalc Manual

Posted: Sun Dec 04, 2005 11:48 am 

Replies: 19
Views: 2190


... correction result to this whistles calculate-cork-to-end length to get the true length. This also works on flutes. BTW - The Cork to end length in TWCalc is more suited to tinwhistles, on flutes this will throw you off.

 Forum: The Chiff and Fipple Whistle Forum   Topic: TWCalc Manual

 Post subject: TWCalc Manual
Posted: Sat Dec 03, 2005 8:29 pm 

Replies: 19
Views: 2190


Some time ago, I wrote a program called, "TWCalc" - A program for calculating tonehole positions for tinwhistles. After many requests, I have written a manual for using it. The manual is at: http://www.tinwhistles.us/twmanual.htm TWCalc can be ...

 Forum: The Chiff and Fipple Whistle Forum   Topic: Attention whistle makers: Fipple Question

Posted: Thu Oct 27, 2005 4:59 pm 

Replies: 16
Views: 2280


I'll sit down and write some simple instructions for TWCalc. One thing to pay attention to is the cutoff frequencies, Keep them close together, no extremes and the whistle should sound well. If you don't observe the cutoffs, you'll get certain toneholes ...
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