Tempo change between recording and playback

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Midimanz
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2011/07/09 22:29:17 (permalink)

Tempo change between recording and playback

I am stumped by the following problem and would appreciate some help.
 
I am recording a single audio track at 120 BPM, but when I play it back, the tempo is changed to somewhere in the range of 140 - 150 BPM. What starts out as 6 bars of audio finishes up as something close to 5 bars.
 
The clock is set to "Audio" which I understand to mean that it is deriving timing from my M-Audio FW410. In fact, the project defaults to "Audio" no matter what I try to set it to.
 
What am I missing here?

Knowledge, grounded on accuracy, aided by labour and sustained by perseverance, will finally overcome all difficulties.
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    Bub
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    Re:Tempo change between recording and playback 2011/07/10 01:08:16 (permalink)
    It sounds like maybe you inserted a tempo change by accident.

    It's easy to do, especially if you already recorded some audio, then go back and decide you need to change the tempo.

    Other than that, I don't know what could cause that problem.

    Hope that helps.

    Bub

    "I pulled the head off Elvis, filled Fred up to his pelvis, yaba daba do, the King is gone, and so are you."
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    rbowser
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    Re:Tempo change between recording and playback 2011/07/10 02:00:23 (permalink)
    Midimanz


    I am stumped by the following problem and would appreciate some help.
     
    I am recording a single audio track at 120 BPM, but when I play it back, the tempo is changed to somewhere in the range of 140 - 150 BPM. What starts out as 6 bars of audio finishes up as something close to 5 bars.
     
    The clock is set to "Audio" which I understand to mean that it is deriving timing from my M-Audio FW410. In fact, the project defaults to "Audio" no matter what I try to set it to.
     
    What am I missing here?


    Were you recording to a click?  Sounds like you were playing in free time.  You're not saying that the recording is playing back faster than you recorded it are you-?

    RB

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    #3
    Midimanz
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    Re:Tempo change between recording and playback 2011/07/10 04:15:07 (permalink)
    Thanks for the assistance Bub and RB. I've solved the problem! The WDM/KS driver was the villain here. 
     
    I was recording against the metronome, but as soon as I stopped and played the track back, the length of the track "shortened" and the tempo therefore went up. I discovered by chance that changing the mixing latency altered the length of the recorded audio!! That directed my attention to the driver and after  I swapped to an ASIO driver all the grief went away. It is now behaving perfectly. :-)

    Knowledge, grounded on accuracy, aided by labour and sustained by perseverance, will finally overcome all difficulties.
    #4
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