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Easy ZMA and T/S Parameters Using The LIMP Module in ARTA - An Illustrated Guide

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  • #61
    And please don't forget to read Charlie Laub's excellent guide on how to generate FRD files for your drivers using the ARTA module. Once you know how to obtain T/S parameters, model your box, generate ZMA and FRD files, crossover modeling is just a few steps away. It's very difficult to help newcomers without good data, but when you have a good set of measurements, everyone here can help you put together a great sounding system that you can call your own.

    https://www.google.com/url?sa=t&rct=...tTYmRDHMCrTtUw
    Some people are addicted to Vicodin. I'm addicted to speaker building.

    The Chorales - Usher 8945A/Vifa XT25TG Build
    ESP Project 101 Lateral MOSFET Amplifier
    LM4780 Parallel Chipamp
    Sonata Soundbar Project
    The Renditions - Active/Passive Towers

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    • #62
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      I win the internet today, ya'll can stop tryin'

      Christmas present from the kid
      Don't listen to me - I have not sold any $150,000 speakers.

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      • #63
        You've got to love the grin on that face...
        Some people are addicted to Vicodin. I'm addicted to speaker building.

        The Chorales - Usher 8945A/Vifa XT25TG Build
        ESP Project 101 Lateral MOSFET Amplifier
        LM4780 Parallel Chipamp
        Sonata Soundbar Project
        The Renditions - Active/Passive Towers

        Comment


        • #64
          Arta is updated to 1.9.0 as of January, 6, 2017 1.9.1 as of now
          Last edited by tedwilt; 03-10-2017, 05:43 PM.
          I was tired and got tired again so now I am Re tired.

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          • #65
            This is Great, Thanks!!

            I'd be even better if somebody contributed with the ARTA Switch Box Illustrated Guide for newbies like me

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            • #66
              Hi all,

              I want to thank again for this great post and Im hoping somebody can clarify something for me, I bougth some drivers that are rolling around on Amazon and Ebay and Im using the jig to measure them but the results are not smooth as I usually see them, is that OK or am I doing something wrong? Please see picture.

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              Thanks,
              Alex
              Attached Files

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              • #67
                I had that happen three times. First time was the original POS Dayton Woofer Tester 3, second and third times were both bad USB sound cards. My original self-contained jig using an inexpensive Ebay sourced USB card gave up the ghost and started doing that same thing. The last time was when I tried using a Behringer UMC202HD which was a noisy POS.

                I switched to a Creative X-Fi USB model and that thing is squeaky clean from 10Hz to well over 40K.
                Don't listen to me - I have not sold any $150,000 speakers.

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                • #68
                  Originally posted by johnnyrichards View Post
                  I had that happen three times. First time was the original POS Dayton Woofer Tester 3, second and third times were both bad USB sound cards. My original self-contained jig using an inexpensive Ebay sourced USB card gave up the ghost and started doing that same thing. The last time was when I tried using a Behringer UMC202HD which was a noisy POS. I switched to a Creative X-Fi USB model and that thing is squeaky clean from 10Hz to well over 40K.
                  Thanks for the reply!!

                  So, I do have a problem then, I will try another computer and see how that goes.
                  Last edited by AlexRivera; 06-25-2017, 09:12 AM.

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                  • #69
                    Another question for the experts, so if the "100" Ohms resistor ended up being a 98.9 Ohms resistor do I need to adjust something else or enter some compensation value somewhere?

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                    • #70
                      Originally posted by AlexRivera View Post
                      Another question for the experts, so if the "100" Ohms resistor ended up being a 98.9 Ohms resistor do I need to adjust something else or enter some compensation value somewhere?
                      Alex, I don't believe it's going to make a big difference, since you're talking about being 99% close to the reference value. However, to change the value of the resistor, go to Setup, then select Measurement to see this dialog box:
                      Click image for larger version

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                      Last edited by hongrn; 06-29-2017, 06:20 PM.
                      Some people are addicted to Vicodin. I'm addicted to speaker building.

                      The Chorales - Usher 8945A/Vifa XT25TG Build
                      ESP Project 101 Lateral MOSFET Amplifier
                      LM4780 Parallel Chipamp
                      Sonata Soundbar Project
                      The Renditions - Active/Passive Towers

                      Comment


                      • #71
                        Originally posted by hongrn View Post

                        Alex, I don't believe it's going to make a big difference, since you're talking about being 99% close to the reference value. However, to change the value of the resisitor, go to Setup, then select Measurement to see this dialog box:

                        [ATTACH=CONFIG]n1337153[/ATTACH]

                        Awesome Thanks Hong!!!

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                        • #72
                          Thanks for the post Hong.

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                          • #73
                            Calibration question... it's not clear if cal is done with output looped to input (that's what LIMP seems to say) or with the jig plugged in but not connected to anything on the test clips. Which is it?

                            I fought this crap for four days getting nowhere. I built a jig per diagrams but it would. not. work. for anything. All I got was two nearly straight horizontal lines. Tried 3 different laptops with WDM and ASIO drivers, my desktop with a good Xonar DG card, and then the onboard sound on the desktop. No go on all. Didn't start working until I went to Measurement Setup > Measurement config > Reference channel > and changed from the default Right, to Left. All of a sudden it's giving plausible results. What did I do wrong?

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