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DATS v3 - rough impedance sweeps

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  • DATS v3 - rough impedance sweeps

    I've owned the DATS v1, v2, and now (after waiting 4 months) the v3.

    I immediately noticed - when doing an impedance sweep to examine the tuning of a given enclosure - Z is all over the place. What was a smooth curve in v1 and v2 is now a rough mountain range in v3. What gives?
    Attached Files

  • #2
    pic?

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    • #3
      Turn the volume up on the USB Audio Codec device.
      "I just use off the shelf textbook filters designed for a resistor of 8 ohms with
      exactly a Fc 3K for both drivers, anybody can do it." -Xmax

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      • #4
        I think the new version has way less smoothing than previous.
        Even on the ' calibrate ' there is a roughness on the phase response
        where before it was smooth.

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        • #5
          I have a related question of I could jump into your thread. After an upgrade to Windows 10 my DATA v2 no longer works. Is v2 supposed to work with 10? Thanks!

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          • #6
            Stupid auto correct.

            Comment


            • #7
              Sure, V2's workin' on Win10 on the notebook.
              Some (audio) setting got hosed, or "reset" (for your convenience).
              Check levels in various places (try going back to the PDF startup guide an follow along - like you just bought the thing!)

              I THINK W10 always tried to set itself back to "1ch" at the wrong sampling rate. It needs to be "2ch" @ 44.1kHz (this was BESIDES the vol. settings thing).

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              • #8
                Originally posted by Chris Roemer View Post
                pic?
                pic is in post

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                • #9
                  Originally posted by dcibel View Post
                  Turn the volume up on the USB Audio Codec device.
                  volume is 100%

                  Comment


                  • #10
                    Originally posted by hitsware2 View Post
                    I think the new version has way less smoothing than previous.
                    Even on the ' calibrate ' there is a roughness on the phase response
                    where before it was smooth.
                    I've noticed that as well. =/

                    Comment


                    • #11
                      I can't say why it's so rough, but so long as you see the peaks and valley it's telling you what you want to know.
                      www.billfitzmaurice.com
                      www.billfitzmaurice.info/forum

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                      • #12
                        > I can't say why it's so rough,

                        Less ' smoothing ' than earlier program ....

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                        • #13
                          That is not a "less smoothing" issue. It is clearly noise, caused by poor signal to noise ratio, improperly set gains, or a cold solder joint/bad wire connection.
                          Craig

                          The lowest possible F3 box alignment is not always the best alignment.

                          Designing and building speaker projects are like playing with adult Lego Blocks for me.

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                          • #14
                            (Even though it LOOKs like the orig. "WT3 Beta Testers" forum has been culled ...)

                            I'm pretty sure that I contacted John re: one of the (WT2? / WT3?) "upgrades" which suffered from this exact same problem, and he said it was an easy fix, and he FIXED it !

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                            • #15
                              Originally posted by Chris Roemer View Post
                              I THINK W10 always tried to set itself back to "1ch" at the wrong sampling rate. It needs to be "2ch" @ 44.1kHz (this was BESIDES the vol. settings thing).
                              Yes, I think one release of Windows 10 did have this "feature" (sigh). I remember running into this same issue some time ago.

                              Just make sure that you're running the latest release of Windows 10, with all the updates.
                              Brian Steele
                              www.diysubwoofers.org

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