Converting DV recorded w/ 12bit sound to 16bit before burning to DVD

Discussion in 'Amateur Video Production' started by 427Cobraman, Dec 8, 2004.

  1. 427Cobraman

    427Cobraman Guest

    Hi all,

    I hope this is the right forum for this problem I have. I am new to
    DVD authoring and have limited tools. I have a Plextor external DVD
    writer (PX-712UF) and a TRV27 DV camcorder using firewire for
    downloading to the computer. The DVD authoring software I have is
    ROXIO DVD creator 6.X Basic and it (to me) works pretty darned well.
    The problem I have is a very tinny sound to the higher frequencies when
    playing back from the DVD. I finally figured out that only footage
    recorded @ 12bits would sound this way. Everything I taped @ 16bit
    sounds fine after being burned to DVD. Is there a way to somehow
    convert the audio from these tapes to 16bit before burning to DVD?
    Should I try different software? A different forum, perhaps? ;^)
    Thanks a bunch,

    427Cobraman, Dec 8, 2004
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  2. 427Cobraman

    RS Guest

    You can convert it, but I doubt it will make much difference as it won't
    create extra quality where none existed before.

    You can get one of the sound editing programs and do some tweaking on the
    file to improve it. Cakewalk, Audigy ect.
    RS, Dec 8, 2004
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  3. Have you listened to the 12-bit audio tracks directly off
    the tape? Why do you think it was burning to DVD that
    caused the effect? I'd bet that the DVD step has nothing
    to do with it. 12-bit sound is inherently and audibly inferior.
    Likely the only thing that will prevent the effect is to avoid
    any future sound recording in 12-bit resolution.
    Richard Crowley, Dec 9, 2004
  4. 427Cobraman

    427Cobraman Guest

    When I listen to the captured video before the burn, I can't discern
    the tinny sound. It not until after the DVD is created I can hear it.
    427Cobraman, Dec 9, 2004
  5. Then maybe you need a better conversion method for 12-bit
    to 16-bit. OTOH, it could be the rate conversion (32K vs. 48K)
    that is causing the artifacts. You could try exporting the 12-bit
    audio and upsampling it in a specialty audio application that
    would take better care of it.

    I would never shoot 12-bit just for this reason. Can't think of
    any reason to use this "feature" except somebody accidently
    hitting the wrong switch.
    Richard Crowley, Dec 9, 2004
  6. Well, 12-bit allows for later adding a second audio track to the

    OTOH, I don't actually think that's a reason to shoot 12-bit audio

    Gene E. Bloch, Dec 9, 2004
  7. ...
    Do you have any equipment that supports that? Have you ever done
    that? I have yet to hear anyone answer yes to either of those questions.

    You have proved that the disadvantages overwhelmingly outweigh
    whatever percieved advantages the format has.
    Richard Crowley, Dec 10, 2004
  8. 427Cobraman

    427Cobraman Guest

    Well, it was set to 12 bit by default and I noticed this while playing
    around with the different menus one day. Unfortunately, there was
    quite a few hours of footage filmed before discovering this. :( Is
    there software that will strip the audio from captured AVI's? I might
    just try to capture audio only to see if I can do anything with it.
    427Cobraman, Dec 10, 2004
  9. I have equipment that supports that. I have never done that.
    I have proved nothing.

    Gene E. Bloch, Dec 11, 2004
  10. You have equipment that lets you go back and add two audio
    tracks to a recorded tape? Or it lets you record all four
    channels simultaneously?

    You have equipment that plays all four tracks concurrently?

    Ironically high-end pro equipment supports the 4-channel
    functionality. Alas, the very audience that is least likely to
    use it. I'm sure it seemed like a good idea when they were
    inventing the format.
    Has anybody?
    Would you care to explain your position? Or is this just a
    drive-by argument?
    Richard Crowley, Dec 11, 2004
  11. Yes to adding a second set of tracks. AFIK, no to recording four at
    Yes. I can also, on playback, change the audio mix between pair 1
    and pair 2 from 0-100 up to 100-0.

    See pages 73-76 of the Sony TRV-20 manual for all of the claims I
    have made above.
    I haven't investigated. I certainly haven't done it - or wanted to.
    I haven't made any claims, nor have I provided any arguments, on the
    subjects of advantages or disadvantages. All I said was that one can
    dub extra tracks to MiniDV tape recorded using 12-bit audio, a fact
    which I can substantiate. Given that, how could I have "proved that
    the disadvantages overwhelmingly outweigh whatever perceived
    advantages the format has", to quote you?

    Gene E. Bloch, Dec 11, 2004
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