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 downloaded at: http://www.tinwhistles.us/twcalc.htm
Most excellent my friend! I intend to print myself a copy and tinker around with this one. Just for curiosity, I’ll plug in the figures for my own whistles and see how they compare to your results!
Thanks, Daniel!!! Very clear.
Is there any way I can better predict actual cork-to-end lengths? On one-piece flutes this is the dimension that ends up biting me.
Let’s say you make a high-D whistle and it plays in tune. Then you decide to make a Low-E with the same style fipple and tubing diameter. From the known whistles actual cork-to-end length vs the calculated-cork-to-end length you can arrive with a length correction by subtracting the two.
Then when you make the Low-E whistle, simply add the 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.
Thanks!
I just used the Cork To End (and other calcs) to make a new mezzo A tube for a Meg head. It was an experiment to see if I could ‘get it right’ on paper before any cutting or drilling. It worked beautifully. A bit of deburring and some undercutting to tweak the second octave, and the whistle is in tune with enough wiggle-room on the head to tune 15 cents sharp or 30 cents flat.
This time I even paid attention to the cutoff freqs, so volume and tone are pretty even. Couldn’t have done it without TWCalc (OK, I could have broken out the old acoustics text and spent far too long with a scratch pad and calculator, made a bunch of errors and had to start over anyway).
If I ever sell a whistle, I owe you some dough.
The TWCalc would not open. It said 404 not found?
woowoo!
It would not open for as well, although the manual page did. Otherwise, an awesome site with great products. I bookmarked it for future WHOA.
Bob Z.
The TWCalc program is a windows program and it is zipped. You have to unzip it first.
I concur, the url for the program doesn’t seem to work so I can’t download it, I get a …
404 Not Found
The requested URL was not found on this server.
Jubilee Music Instrument Co.
… as well. Sounds like a great program, I’ll start reading the manual first.
Well worth waiting for the server to be sorted out (didn’t work from here either; just thought I’d try).
I give up. Where is the zipper.
Here are some unzip programs: http://www.google.com/search?hl=en&q=winzip
Hi,
Thanks so much for your program. I use Avast antivirus software, and it looks like that may be the problem. But here is the error message I receive each time I run TWCalc:
C:\Program Fieldsälwil Softwareävast4äSwMonVd.dll. An installable Virtual Device Driver faill Dll initialization. Choose ‘Close’ to terminate the application.
Close Ignore
To run the program, I have to choose Ignore.
Any ideas?
Thanks. Your program has helped me to produce in-tune whistles.
Phil
The link is repaired.
Thanks for fixing the link. It looks like a cool program for keeping dangerous people like me occupied.
Bob Z.
N4VGM DE KA8ZPL
Yes, TWCalc is for very dangerous people. I have a whistle and I’m afraid to use it.
Tho’ I walk into the valley of the shadow of bodrans,
I fear no whistle.
Sorry, on so many levels.
ROTFLOL,
oops, I meant, “I have a whistle and I’m not afraid to use it”.
The posting blooper of the week.
I must not fear.
Fear is the mind-killer.
Fear is the little-death that brings total obliteration.
I will face my fear.
I will permit it to pass over me and through me.
And when it has gone past I will turn the inner eye to see its path.
Where the fear has gone there will be nothing.
Only WHISTLE will remain.