Blog Forums DIY Speakers and Subwoofers The Best FRD and ZMA Tracer – FPGraphTracer

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12 replies
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    • #10959
      123toid
      Keymaster


      In order to make a custom crossover you need to have the FRD and ZMA files. Now there are many ways to go about attaining those files, but it is not always easy to find them. In fact some companies only give you the information you need in a PDF file with no easy way to extract the data. Or at least, not until now.

      FPGraphTracer has become one of my favorite free programs. In the past, i used SPL copy, which worked, but you had to manually trace the line if the program could not find it. You also had to pay close attention to see if it was tracing it correctly. Well that was not only a pain, but could take over 10 minutes to get a good trace. It was not very efficient or user friendly. FPGraph tracer is the exact opposite.

      The program is simple and easy to use. All you need to do is set the limits on the left hand side. Once set, click on what you want to trace. A pink line will show up, if it is not perfectly align just adjust the part that is misaligned, but clicking on the graph (the place where the line should be). The pick line should then align.

      Once you have everything aligned, just click save File – Save Data.

      Then select the file type to save as. Impedance files are saved as ZMA and frequency response files are saved as FRD.

      That is it, you are finished. Now enjoy modeling the drivers!


    • #10960
      Unknown
      Guest

      having trouble getting Bagby's modeling excel software to recognize the data. Got a good trace, just imports into the program as a flat line

    • #10961
      123toid
      Keymaster

      @Unknown

      Typically when this occurs this is due to the fact, that some wording was added before the data.  To rectify this, just open up the frd file and delete any letters, words or spacing befor the data starts.  Then save it.  This should fix any issues you were having.

       


    • #14049
      audio-alien
      Participant

      Is it just me or is the download link not working?  Anyone know of another way to download FPGraphTracer?

    • #14052
      tvor-ceasar
      Moderator

      @audio-alien looks like the webpage is down or gone. I’ll look further when I get home.


    • #14056
      tvor-ceasar
      Moderator

      No luck, looks like it was a university page that is gone. But, it’s out there. And here.


    • #14057
      123toid
      Keymaster

      @audio-alien 

      dang that is rough.  I can’t believe it is down.  I don’t believe I have the zip file.  Anyone else have it?  I can upload it here so others can get it.


    • #14060
      tvor-ceasar
      Moderator

      @123toid You mean this one? 🙂

      2607-FPGraphTracer.zip

      (previously at http://labs.fprawn.com/ , but the site is down)


    • #14061
      123toid
      Keymaster

      @tvor-ceasar have I ever told you you’re awesome? Because you’re awesome! 

       

      I’ll set that as a download link later. Thanks


    • #14062
      tvor-ceasar
      Moderator

      Yeah, but I don’t let it go to my massive head. LOL

      I have lots of stuff saved exactly for this reason. The Internet is not a static place.


    • #14065
      audio-alien
      Participant

      @TVOR-ceasar Thank you very much for the file!

    • #14066
      tvor-ceasar
      Moderator

      @audio-alien You’re welcome. I have no problem passing along the freeware that we’ve found to be useful.


    • #15032
      tvor-ceasar
      Moderator
      Posted by: @tvor-ceasar

      @123toid You mean this one? 🙂

      2607-FPGraphTracer.zip

      (previously at http://labs.fprawn.com/ , but the site is down)

      The site is currently back up. If anyone needs this for Mac OSX, that’s available too.

      3072-FPGraphTracer-osx.zip


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