Do you use TWCALC?
Do you use TWCALC?
It calculates parameters for flutes, and clarinets
I was just wondering how cork to end length is measured for a clarinet?
I was just wondering how cork to end length is measured for a clarinet?
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- Cyfiawnder
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- Cyfiawnder
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- happyturkeyman
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Yeah I haven't really figured out the graph yet, I think the flatter the better but im REALLY not sure.xoot wrote:Yeah but, the latest one at least, has an option to change the wave divisor from 2 to 4 (for clarinets)Cyfiawnder wrote:What? I use TWCALC for whistles....
Another question is how do you choose hole sizes - just trial and error - looking for a flat graph?
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- Cyfiawnder
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Holy Shmokes!!! Someone here knows what Cyfiawnder means!!! I thought it was nothing but C Gaelic speakers here!!! Nice to toss some good old Cymru into the mix Didn't I already mention the volume/hole thing??John S wrote:S'mae Cwfawnder
The member from the Palace of Righteous Justice has summed up the hole size question well; there is also a need to keep the sizes as similar as possible to avoid volume disparities.
John S
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- ctilbury
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I am in the process of writing a program that is very similar to TWCALC. I intend to release the source code and executables as GPL software.
I want to be able to do optimizations based on things like the cutoff frequency or to say where I want the holes, and the prog will tell me (about) what size to make them.
The program will be GUI based and portable between MAC, U*IX, and Windblows. I have most of the math part done and I am starting on the GUI interface.
Anyone have any ideas as to what may be useful? Anyone want to help? (Written in C and C++)
Other comments?
I want to be able to do optimizations based on things like the cutoff frequency or to say where I want the holes, and the prog will tell me (about) what size to make them.
The program will be GUI based and portable between MAC, U*IX, and Windblows. I have most of the math part done and I am starting on the GUI interface.
Anyone have any ideas as to what may be useful? Anyone want to help? (Written in C and C++)
Other comments?
That sounds like a good project...ctilbury wrote:I am in the process of writing a program that is very similar to TWCALC. I intend to release the source code and executables as GPL software.
I want to be able to do optimizations based on things like the cutoff frequency or to say where I want the holes, and the prog will tell me (about) what size to make them.
The program will be GUI based and portable between MAC, U*IX, and Windblows. I have most of the math part done and I am starting on the GUI interface.
Anyone have any ideas as to what may be useful? Anyone want to help? (Written in C and C++)
Other comments?
Just based on my limited experience with twcalc -
- hole size suggestions (as you describe) would be nice, with option to limit to fractional drill sizes or custom (so they need to be filed after drilling)
- a proper file save/load dialog, with one default file loaded at startup
- example files (starter designs)
- good help file or documentation
- auto-recalc when a parameter is changed
- diagram/plan printout with dimensions
- dialog to choose pipe and schedule, which will enter the correct bore and wall thickness automatically
- setup dialog, or have the program remember setup (metric vs imperial for example)
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- Daniel_Bingamon
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TWCalc is written in good old fashioned Visual C (no stinkin ++). If you want a copy of the source, send me a personal email (click on email button below).
I'm designing TWCalc with the goal of monitoring Local Cutoff frequency more closer - as it is the key to designing consistant sounding toneholes.
What would be nice is some AI type logic that tries a given set of standard drill sizes, human hand stretch limitation parameters with the goal of consistantly increasing local cutoff up the scale and let the computer calculate the optimum set.
You might want to make use of some of my code.
Re. The graph - flat is good with a little rise as it increases in frequency.
It's a linear graph and would ultimately be better if it were expressed exponentially.
Clarinet mouthpieces will give you problems with the length. Make a piece of tube with a Clarinet mouthpiece on it. The shape of mouthpiece and frequency of the beating reed is going to distort the size calculation. (this is Benade's book) Using a reference piece of tubing, you can adjust the reference for the right note and then compare to the theoretical size - use the difference as an offset for and other piece of tubing of the same diameter for any different key.
I'm designing TWCalc with the goal of monitoring Local Cutoff frequency more closer - as it is the key to designing consistant sounding toneholes.
What would be nice is some AI type logic that tries a given set of standard drill sizes, human hand stretch limitation parameters with the goal of consistantly increasing local cutoff up the scale and let the computer calculate the optimum set.
You might want to make use of some of my code.
Re. The graph - flat is good with a little rise as it increases in frequency.
It's a linear graph and would ultimately be better if it were expressed exponentially.
Clarinet mouthpieces will give you problems with the length. Make a piece of tube with a Clarinet mouthpiece on it. The shape of mouthpiece and frequency of the beating reed is going to distort the size calculation. (this is Benade's book) Using a reference piece of tubing, you can adjust the reference for the right note and then compare to the theoretical size - use the difference as an offset for and other piece of tubing of the same diameter for any different key.
Thanks heaps. Yes, that offset could be regarded as the 'length' of the mouthpiece - to be added to any given length for the total 'cork to end' length.Daniel_Bingamon wrote:
Re. The graph - flat is good with a little rise as it increases in frequency.
It's a linear graph and would ultimately be better if it were expressed exponentially.
Clarinet mouthpieces will give you problems with the length. Make a piece of tube with a Clarinet mouthpiece on it. The shape of mouthpiece and frequency of the beating reed is going to distort the size calculation. (this is Benade's book) Using a reference piece of tubing, you can adjust the reference for the right note and then compare to the theoretical size - use the difference as an offset for and other piece of tubing of the same diameter for any different key.
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- Cyfiawnder
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- Daniel_Bingamon
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