TWCalc
TinWhistle Hole Calculator V3.22
TWCalc is a Freeware program that runs under
MS-Windows.
Note: TWCalc also runs under 'WINE' for linux
with the exception of the graph.
It allows you to
calculate hole positions for 6-hole tinwhistles and flutes.
The latest changes reflect the recent formula changes
that are in my FLUTE-DIATONIC Excel Spreadsheet.
For many years,
many in the whistle industry have been using the tone hole matrix
formulas developed in the late 1970's,
I discovered that most of
the programs out there do not calculate closed hole correction right
and recently discover an error in
the chimney correction for sharp
edge toneholes using 61.33% efficiency instead of 75%.
What
this caused on many whistles that are made by various maker's today
to be flat on the low end notes and gradually gets sharper
before
it reaches the top tonehole notes.
Version 3.22
Add individual tonehole bore diameters
This is the first step in supporting tapered bores!
Experimental
Version 3.21
Fix L/B Ratio Glitch
Change "UNIT" to "UNITS" in stored data.
Version 3.2
Changes to Chimney Correction, Length
Calculation, minor display changes
Version 3.1
Adding Modes
Version 3.0
Conversion to 32 Bit Windows
Version 2.0 - unpublished
Version 1.7
Save multiple - new file form. Minor cleanups.
Version 1.6
New addition to program allow for instruments with cylindrical closed end bores, such as clarinets, reed pipes, etc.
Version 1.5
This new version allows metric and english units.
Floating Point Errors are now trapped and also has quick selection of music modes. More modes will be added in time
DOWNLOAD TWCALC Version 3.22
TWCalc is a zipped file. Save it to your hard disk and unzip it first with PKZIP or WINZIP.
Email Daniel Bingamon - Jubilee Music Instrument Co.