Recent content by user44455555

  1. U

    FSAF (Fast subband adaptive filtering) measurement

    I noticed this worse results on the larger speakers too. but i only meaasure at more levels with the adam d3v . with the nearfields microphone position i use need from the SPL value subtract 15 db to reach 1 meter value. I add a calcued level to the other speakers too.That the kali have much...
  2. U

    FSAF (Fast subband adaptive filtering) measurement

    I get now with newest beta good results in mid and high freq. All i test currently of my speakers can measure now in nearfield few cm to woofer ..only i see when level is 76 db at 1 meter (measures with check level and a hand db measure instrument) at 50 hz distortion is 2%. when go to 80 db...
  3. U

    REW Beta Release REW API beta releases

    Hello please see video, the time of the slice is often not visible in this mode. It stand in the line of 80 db but the slice do not overlap it
  4. U

    FSAF (Fast subband adaptive filtering) measurement

    maybe when use music which contain transients and timing it is diffrent. https://www.avnirvana.com/threads/fsaf-fast-subband-adaptive-filtering-measurement.13810/page-15#post-125924 here i have the measures of speaker with diffrent tweeter delay. groupdelay show over 3 khz 0 ms for tweeter but...
  5. U

    FSAF (Fast subband adaptive filtering) measurement

    the original for distortion i have add in the FSAF File selector. or that there is a Import audio FSAF which let choose the original first and then the recordet. because to check the FSAF working better, it does not help to create a time shift tweeter file and do with this a loopback because it...
  6. U

    FSAF (Fast subband adaptive filtering) measurement

    @John Mulcahy import audio do not work to load music audio so FSAF distortion is calculate from that importete audio. How can i do that easy ?. for example a audio create with that script to simulate tweeter shifts. I ask the AI to create several testing scripts, i test that later if it work...
  7. U

    FSAF (Fast subband adaptive filtering) measurement

    then you can show FSAF results of basstest or drumtest wav diffrence here too. I do not understand wy you post results of a incomplete audio system that you not use for hearing. does FSAF work on your 4 way line array ?. you can also upload impulses so can see what happen in REW. you can also...
  8. U

    FSAF (Fast subband adaptive filtering) measurement

    You can also show an example if that can work(if you find this usefull) here can see step response of a good time aligned speaker https://www.audiosciencereview.com/forum/index.php?threads/neumann-kh120-ii-monitor-review.46362/ You have written about the woofer SB16PFC you use. but what...
  9. U

    FSAF (Fast subband adaptive filtering) measurement

    here i have a drumloop 3 test. level is below 0 db it do no clipping but i need reduce measure level to -13 db at least to get no clipping warning from REW Wy this and what is CF 22.8 db ? . On other tests it is only 11 db. In the distortion view results look better. I begin the loop with a...
  10. U

    FSAF (Fast subband adaptive filtering) measurement

    yes i notice that too, because the transients are always louder in the residuals than in the original, which mean that the speakers are worse and slow I understand that in a dynamic signal it is hard to show distortion overall. so maybe a time slider for ther FSAF distortion is the best ?. then...
  11. U

    FSAF (Fast subband adaptive filtering) measurement

    Personally, I find real-world, practical results to be the most important. I have never used MATLAB in my life. That being said, I never fundamentally dismiss theory. However, I always prefer to run actual experiments first to verify whether the theory holds true in reality. As the old saying...
  12. U

    FSAF (Fast subband adaptive filtering) measurement

    to calibrate you need a reference mic whre to know the FR. cheap measure microphones have large diffrence between same time. because i have a MM1 as a reference i can calibrate the B5. only disadvantage of B5 is, because it have large capsuale it is not so precise at over 4 khz. so real measure...
  13. U

    FSAF (Fast subband adaptive filtering) measurement

    First: i remember i forget to say how i use REW audio. I use always Asio driver so this is perfect sync asio can report buffer size and calculation is possible to subtract latency. ASIO on windows is optimized for realtime record and playback in sync. The beyerdynamic is a condensor measure...
  14. U

    FSAF (Fast subband adaptive filtering) measurement

    before i have in this post upload the mdat file. https://www.avnirvana.com/threads/fsaf-fast-subband-adaptive-filtering-measurement.13810/page-14#post-125850 but i do a screenshot now, hope it show what you mean. strange is in distortion it show the fundamental diffrent to the SPL page of the...
  15. U

    FSAF (Fast subband adaptive filtering) measurement

    and why when there are frequencies not in, does it show such a high distortion value ?. normaly it should show on high frequencies the % of the high freq noise. maybe 1-2% and not over 50%. over 50% distortion can happen when SNR is only 6db. but i get easy much more as 30 db SNR I reduce the...
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