Special pricing for MI Pro to make GedLee Metric (Gm distortion) & Non-Coherent Distortion (NCD)

Discussion in 'Product Announcements' started by MI Pro, May 31, 2018.

  1. MI Pro

    MI Pro New

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    Hello Everyone,

    I have posted a Group Buy (GB) announcement for audio analyzer software that does the following:

    - Traditional, old fashioned, and non-relevant (IMO) THD and IMD, but far more importantly, the vastly more modern and relevant non-coherent distortion (NCD) as well as the Dr. Earl Geddes "GedLee Metric" (Gm distortion).

    - If you own an RTX6001 audio analyzer this software has a custom API that controls the RTX's internal attenuators and gains to allow for true autoranging and autoscaling (which is a HUGE deal).

    - Even if you don't own an RTX6001 and instead use a soundcard type of approach, the new distortion and other features of this software will prove to be very useful to many IMO.

    You can read more about this GB audio analyzer software at: https://bit.ly/2LdMtB9
     
  2. purr1n

    purr1n Desire for betterer is endless.

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    Is this the guy behind the Ged Lee metric? If so, then I am all behind it.
    [​IMG]

    Sorry, corny joke, but I could not resist.
     
    Last edited: May 31, 2018
  3. L'Orfeo

    L'Orfeo MoatsArt the Second

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    That's a moving picture.
     
  4. SineDave

    SineDave Friend

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    Snark aside, I do agree that NCD and Gm distortion are very useful measures and are very useful when evaluating speakers, though I don't think they are quite as useful in single driver headphone measurements.
     
  5. MI Pro

    MI Pro New

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    Thank you for taking the time to post a comment. Actually, if you look at the AES research I cite the URL links to here https://bit.ly/2spOgvI you'll see that in well conducted double blind studies NCD proved to be the only way of objectively measuring distortion of headphones that actually correlated with how trained audio listeners hear, (but the same AES papers / YouTube AES presentation I cite at that URL link show that THD and IMD do *NOT* correlate at all with how we hear using headphones). Note too that Dr. Earl Geddes GedLee Metric (Gm distortion) was not used in this AES study (since until a month ago, there existed no audio analyzer on earth can could objectively measure it).

    In any event, thank you again for taking the time to post your comment. I hope you find the linked AES papers and AES YouTube presentation enlightening.

    Have a great day!

    V/R,

    MI Pro
     
  6. MI Pro

    MI Pro New

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    Hot: See this diyaudio MI Pro GB posting on pricing: https://bit.ly/2JJ38zh

    In addition to the previous posting where I addressed the GedLee Metric (Gm distortion) as well as non-coherent distortion (NCD) capabilities of MI Pro, I wish to let others whom are interested in headphone and IEM measurements know that in point of fact, there may be one more added soon which is based on the work as seen in this AES paper: Perceptual Assessment of Headphone Distortion, by Louis D. Fielder, Dolby Labs, Oct 2017, (currently working out some things, but it appears to be highly likely that it too will soon be in MI Pro).

    Remember too, that all upgrades to MI Pro are free for life so any updates (like the above) would be free for all MI Pro customers too.

    V/R

    MI Pro
     

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