#47 record sample rate 44101

closed-out-of-date
5
2005-05-01
2004-04-06
Anonymous
No

installed the following download
http://easynews.dl.sourceforge.net/sourceforge/rezound/rezound-0.9.0beta-1.i
586.rpm
on HP Pavilion running LINUX RH 9 kernal 2.4.20-8

Recording sample rate is 44101 instead of 44100

Discussion

  • Davy Durham

    Davy Durham - 2004-04-06

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    user_id=28588

    This is likely because you're using the inexpensive on-board
    audio device. These are often unable to open at exact
    sample rates. I used to have a Compaq that would do the
    very same thing.

    Even though it is highly improbable that you could hear a
    difference between 44100 and 44101, I do infact insert a
    sample rate conversion algorithm in the output chain when
    the device does not open to the requested sample rate.

    There should be no harm done except for any (should be
    inaudible) artifacts produced by the sample rate conversion
    algorithm.

     
  • Davy Durham

    Davy Durham - 2004-04-06
    • labels: 403918 --> Minor Runtime Issue
    • assigned_to: nobody --> ddurham
     
  • Nobody/Anonymous

    Logged In: NO

    Thanks for the response.
    I am using a Sound Blaster PCI 128 sound card.
    Rezound recorded at 44100 in an earlier release of rezound
    using this equipment.
    The problem is recording files with the intent of making a CD.
    The good news is ...
    ... This is a hassle ...
    But my work around is using Sound Forge to down convert
    from 44101 to 44100.
    Your are correct ...
    There is no way I can hear the difference.
    It is just an extra step on the way to creating the CD.
    I use rezound to record the analog information as it is
    considerably more reliable than the WINXX environment.
    Most of this analog information is from a Alesis AM51 studio
    microphone
    through a Mackie 1604 mixing board to the SB PCI 128 sound card.
    I could drop back to an earlier release of rezound.
    However, I prefer access to the newer additions.
    Perhaps it is a hardware issue.
    It seems odd that it worked before installing the new
    release of rezound.
    I appreciate your comments and input.
    Don

     
  • Davy Durham

    Davy Durham - 2004-04-08

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    user_id=28588

    How did you know it was recorded at 44101? Did you see some
    sort of error message, or did the file come back up saying
    it was 44101?

     
  • Nobody/Anonymous

    Logged In: NO

    Thanks for the response.

    "How did I know rezound was recording at 44101 ?"
    ... Both from an error message when setting up to record
    ... And viewing the resulting file.

    After starting rezound ...
    I selected the record button ...
    the window for how many tracks opened ...
    I selected one or two depending on the objective and
    selected OK.

    At this point an information window opened telling me
    " Note: OSS used a different sample rate (44101) than
    what was asked for (44100) ... OK"

    There was no choice but to select OK.
    So, I selected OK.

    I saved the file as a WAV file.

    I booted Windows and started Sound Forge for final edit and
    cleanup.

    Sound Forge information showed the file to be 44101.

    They are two ways in Sound Forge to convert a file sample rate.

    One is to use a resample program which preserves pitch.

    The second is to open a new recording window in Sound Forge
    at 44100 and
    copy and paste the 44101 file to the 44100 window.
    Sound Forge warns of the conversion and pitch shift.

    As noted earlier ... one hertz is not noticeable ...
    and this method is much faster than running the resample
    algorithm.

    Also ...
    I once attempted to create an audio CD using cdrecord from a
    file recorded using rezound
    where rezound had reported the file recorded at 44101 and
    cdrecord would not create
    the audio CD and reported the file was a bad format.
    I passed the file through Sound Forge as noted above and
    then used cdrecord to create the
    audio CD.

    Earlier versions of rezound on this hardware did not have
    this problem.
    I am currently running rezound v0.9beta.
    I am currently running LINUX 2.4.20-8.
    The PC is an HP Pavilion AMD K-6 with a SB PCI 128 sound card.

    Thanks for your questions and input.
    Don

     
  • Davy Durham

    Davy Durham - 2004-04-15

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    user_id=28588

    Hmm.. very strange that it didn't used to do it. What
    version of linux were you once using? The PCI128 driver in
    2.4 may have had an update since then that reported the
    difference whereas before it just blindly went on.

    ReZound does have the same resample feature under the
    Remaster menu. I understand it's a stupid step to have to
    follow. Yet, what's happening is that I'm asking OSS to
    open at 44100 and it tells me 'ok, but you have to deal with
    44101'.

    What I could do is offer an action to set the sample rate
    indicator to 44100 without doing any work on the data.. then
    the 1 hert (actually 1/2 of a hert considering the Nyquist
    rule) will really just get ignored.

    Please advise.

     
  • Davy Durham

    Davy Durham - 2005-05-01
    • status: open --> closed-out-of-date
     

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