Transmission Line Modelling Software

[schmeet]

Hmm.. I was worried this might happen. I had to change the certificate of the software as it expired.

Can you try installing it as a fresh installation. I.e. uninstall the software completely then go to Leonard audio.co.UK and do a fresh install.

 

[theKenDo]

If i start TransmissionLine i instantly get:

System.ArgumentException: Invalid Parameter.
   bei System.Drawing.Bitmap..ctor(Int32 width, Int32 height, PixelFormat format)
   bei System.Drawing.Bitmap..ctor(Int32 width, Int32 height)
   bei TransmissionLine.myGraphClass.DrawAxisFunction(Int32 DisplayWidth, Int32 DisplayHeight)
   bei TransmissionLine.myGraphClass.DrawAxis(Int32 DisplayWidth, Int32 DisplayHeight)
   bei TransmissionLine.Form1.DrawGraphAxis()
   bei TransmissionLine.Form1.SetupGraphs()
   bei TransmissionLine.Form1.Form1_Load(Object sender, EventArgs e)
   bei System.EventHandler.Invoke(Object sender, EventArgs e)
   bei System.Windows.Forms.Form.OnLoad(EventArgs e)
   bei System.Windows.Forms.Form.OnCreateControl()
   bei System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   bei System.Windows.Forms.Control.CreateControl()
   bei System.Windows.Forms.Control.WmShowWindow(Message& m)
   bei System.Windows.Forms.Control.WndProc(Message& m)
   bei System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   bei System.Windows.Forms.ContainerControl.WndProc(Message& m)
   bei System.Windows.Forms.Form.WmShowWindow(Message& m)
   bei System.Windows.Forms.Form.WndProc(Message& m)
   bei System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   bei System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   bei System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

 

[Greebster]

What OS?

 

[theKenDo]

Windows. But i fixed the problem with a reinstallation

 

[robotc]

I have been using the Transmission Line software with no problems for about a year.

Today when I tried to open it I got the same Microsoft.Net Framework unhandled exception error as theKenDo posted.

I tried deleting and reinstalling the program twice but still get the same error message and the program wont start. The only thing that has changed since I used it successfully is the installation of Windows updates.

Can anyone help?

 

[schmeet]

Do you know what version of .NET you are running? The windows update may have changed that.

 

[robotc]

The version listed is Microsoft.NET 4.5.50938.

The last listed update for Microsoft.NET was a security update about four weeks ago and I am almost certain I have used the program since then. Could another windows update affect the operation?

 

[schmeet]

Hmm this is quite strange. How did you go about deleting the program. Did you you uninstall it from add\remove programs in the control panel?

 

[robotc]

Strange indeed. I did uninstall twice yesterday from add/remove programs in the control panel.

But I just uninstalled and reinstalled for a third time and it now works!!

 

[schmeet]

Oh excellent. Still annoying but at least its working for you now!

 

[theKenDo]

Is it possible to simulate a TQWT (basically a transmissionline but with different start and end area with a open tube (like in bass reflex) like this: http://www.lautsprecherbau.de/design/stories/Artikel/2011/Januar/AX_TQWTHolly/ax_8tqwt_holly_26.jpg ) but with the bass reflex opening at a variable position not just at the end?

 

[Greebster]

Im not sure of the correct acronym but its an expanding (positive taper) mass loaded transmission line.

Have built these using LATL

 

[theKenDo]

Is it possible to vary the position compared to the length of the line of the bass reflex tube?

 

[robotc]

Have a look at pages 20 and 21 of the help file. I shows how to split the enclosure and then add a port. If you then click to select the right hand element you can drag the centre line and the port to any position.

 

[theKenDo]

Thanks!

Really great tool and it's also free - amazing

 

[schmeet]

Thanks for the response robotc and I'm glad you find the program useful theKenDo

 

[theKenDo]

Where did you learn all the mathematical things for simulating this stuff?

 

[schmeet]

Various places really. I did a degree in a related subject and the very first iteration of this software was my dissertation.

I learnt a lot from acoustic engineering textbooks and also found some web resources quite useful.

I'm an acoustic engineer by day too, so that helps!

 

[thunk303]

Hey guys.

I have read the help docs but I can't seem to work out how to add a second driver, is it possible?

Cheers for the great software Schmeet.
Dean

 

[schmeet]

Not really no. You can simulate two drivers but not in different locations.