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correcting audio sampled with the wrong clock.

Discussion in 'Electronic Repair Modifications DIY' started by bmap, Jun 4, 2012.

  1. bmap

    bmap Active Member

    I have audio that was sampled at 44.1 but the ext clock was set to 48k. Obviously now I need a way to change the file definitions to 48k so I can mix it at speed. Normally I would use 2 DAWs , set one to each sample rate, clock them together and digitally transfer. However I dont have two systems any more. Just my one PT rig. Is there any way to get at the definitions and simply change them? Any utility out there to change the sample rate with out actually converting the files. I am mixing in the box so cant simply reclock or bounce.

  2. djmukilteo

    djmukilteo Well-Known Member

    Well first off....I'm sort of confused how you've described your dilemma.
    "sampled at 44.1 but the ext clock was set to 48k".

    So what sample rate was used to "record" the tracks 44.1 or 48k?
    If you recorded them at one rate then you can export and bounce them to another.
  3. bmap

    bmap Active Member

    More info

    This is actually a common problem, though I havent seen it in a while. I loaded in a new client's 44.1k tracks. Everything played slow (tempo) and low (pitch). after a bit of checking and talking to the client about his setup, I figured out that even though his DAW was set to 44.1, his external clock was set to 48k. I pulled out an old video slave driver and slaved my protools rig to 48k and everything played fine. This is much less common now that most external clocking devices are controlled by the DAW. However there are still some stand alone clocks out there - my client has an old aardvark - that must be switched manually. Also just for you young guys this is an old trick (from the early days of digital audio) to vari-speed a session and add a little brightness to a mix - slave your 44.1 session to an external 48k clock and mix to an external deck. Still though without a second DAW to bounce to I need to change the file definitions to 48k so they will play at speed.
  4. TheJackAttack

    TheJackAttack Distinguished Member

    Go to the recording computer forum and look for the sticky talking about mismatched sample rates. There are avenues to change the file headers.

    Sent from my DROIDX using Tapatalk 2

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