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  • Craig Maier
    replied
    Tape wow and flutter can have delta f/f components that extend out to 250 Hz. By Nyquist, locking onto a 60 Hz signal would only allow a maximum theoretical FM component up to 30 Hz to be removed by the PLL. In practice, it will be less than that. Thus, the 60 Hz technique would be very limited in utility. That is why we have not done that. Refer to the Diamond Cut Glossary in the users guide or helpfile under wow and flutter for the industry standard definition of the frequency content of those signals (0.5 Hz to 250 Hz). Basically, you can not get there from here, so to speak.

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  • ckrate
    replied
    Seems to me it would be simple enough to phase-lock to 60Hz, which is how we did it in the analog days.

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  • Craig Maier
    replied
    Hi Cromag,

    I have done both and the number is still in our caller ID memory.

    Thanks,

    Craig

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  • cromag
    replied
    I hope you filed (or will file) a report with your local police department. I've been out of the Bell System/AT&T loop for some time, but it's important to document harassment. If you have not already done so, don't clear your Caller ID memory.

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  • Craig Maier
    replied
    General Notice:

    I just received a telephone call from Mr. Howarth from a friends house (Gregory Creedon) on Nantucket island. This call came in on my wife and my personal (non-business) line at 7:56 PM. Mr Howarth spent 15 seconds cursing me out (with 4 letter words) for my postings here pertaining to his so called technology. I do not tolerate that type of telephone call and thus hung up on him. Here are my suggestions to Mr. Howarth:

    1. Since you claim to have this technology, Mr Howarth, provide a system that performs the task and sell it to those who need it. You will make a lot of money doing that. You will not capitalize on it by talking about it or by cursing out myself or others for expressions of skepticism about it.

    2. If you do not have the resources to commercialize this technology yourself, consider licensing it to one of our competitors. That would be the best way to "stick it to Diamond Cut" - - - wouldn't you agree? That approach would surely beat cursing me out on the telephone for my views on this subject.

    3. In the meantime, do not telephone me again with a string of curses as you did tonight. For that matter, never call me on my personal telephone line. I will view that as harassment should it ever occur again. Remember, I have Gregory Creedons tel number (caller ID) - - - the one from which you called me tonight.

    Sincerely,

    Craig / Diamond Cut Productions, Inc.
    Last edited by Craig Maier; 02-25-2010, 11:04 PM.

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  • Craig Maier
    replied
    Hi Mikeeb,

    How do you discriminate between the natural FMing that one gets with music and human voice and distinguish it from the FM of wow and flutter? As an intuitive example, imagine an opera singer and imagine the amount of Vibrato contained in her voice. Now, imagine this theoretical system that we are talking about removing not only the wow and flutter, but her Vibrato. I think that would generally be considered to be quite musically unacceptable. And, if the system did lock onto her Vibrato and eliminated it, it would still leave behind some vestige of the wow and flutter affiliated with other musical instruments which would sound like artifacts.

    Craig
    Last edited by Craig Maier; 02-24-2010, 01:21 PM.

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  • mikeebb
    replied
    Crazy thought - could you analyze the sound file to figure out the low-frequency signal of the wow or mid-frequency flutter, then apply an equal and opposite frequency in the speed-change filter? Assuming of course that it's regular (as with a record with an off-center hole) - I've had tapes that vary along the length of the tape if the tension is low and a flange is dragging hard.

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  • Marc Hildebrant
    replied
    Craig,

    O.K. then. Sounds like it's wise to just remove the postings (as you did).

    Regards,
    Marc

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  • Craig Maier
    replied
    Hi Marc,

    What he claims to be able to do is to remove wow and flutter, not tape distortion per se. After I revealed the "taboo" here on this site through a protracted public debate, he threatened to sue Diamond Cut Productions for questioning his technology.

    So, I told him to sue us (he never did) and I removed all of the posts from the forum. What he is attempting to do violates the principles set forth by the Nyquist Criteria for control loop (phase lock or otherwise) stability and sample theorems requirement for a certain amount of bandwidth to correct a signal having certain frequency content. In short, IMHO, this is snake oil.

    Craig
    Last edited by Craig Maier; 02-18-2010, 10:48 AM.

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  • Marc Hildebrant
    replied
    Craig,

    Quite a bit of information out on the net with regard to the Plangent abilities to remove tape distortion.

    Are the threads available here to read about the technical details ?

    Regards,
    Marc

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  • Craig Maier
    replied
    Quoting IASForensics:

    "Also, there is a company that does provide the service of removal of wow and flutter from recordings:

    Jamie Howarth, Plangent Processes, http://www.plangentprocesses.com


    I've asked them if they would do a VST or DirectX plugin and the answer was no because the process is not as simple as that."

    -Jonathan

    ------------------------------------------

    Hi Jonathan,

    Mr Howarth is the guy who made the claims on this website that are referred to in this thread. The reason that he would have replied "no because the process is not as simple as that" is simply because the mathematical principles that he described here are completely flawed. If it could have been done, it would have been done.

    It is as simple as that.

    Craig
    Last edited by Craig Maier; 02-18-2010, 10:43 AM.

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  • IASForensics
    replied
    References to Wow and Flutter papers and services

    If you are interested in some serious reading, a paper on the subject of wow and flutter correction was published by AES.org a while back. The link is: http://www.aes.org/e-lib/browse.cfm?elib=12870

    Also, there is a company that does provide the service of removal of wow and flutter from recordings:

    Jamie Howarth, Plangent Processes, http://www.plangentprocesses.com


    I've asked them if they would do a VST or DirectX plugin and the answer was no because the process is not as simple as that.

    -Jonathan

    Leave a comment:


  • sus4chord
    replied
    I remember that thread; it wasn't pretty.

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  • Craig Maier
    replied
    The guy I am referring to was more like Mr. MaGoo. He threatened to sue us after I highlighted the the flaws in his math. A proof consisting of "trust me, it works" does not hold up in the academic world of peer review. What a joke that was!
    Last edited by Craig Maier; 01-09-2008, 07:55 PM.

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  • Dan McDonald
    replied
    Originally posted by Craig Maier
    the genteleman advocated a process which violated all of the laws of physics and mathematics that I am aware of, and thus could not have possibly worked.
    That was that Einstein guy, right Craig?

    Dan

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