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Digital recorder to CD

Discussion in 'Misc Electronics' started by Johan Smit, Oct 3, 2003.

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  1. Johan Smit

    Johan Smit Guest

    Hi,
    I have a Casio digital recorder, and downloads the files to the PC.
    Then I convert the file to standard Windows Wav.
    So far everything is fine, and the sound is good, but when I then
    write it to CD, it sounds awful. I tried all I can think of, with no
    better results.
    I can only think that the low sampling rate of 8000Hz interferes with
    the CD sampling.
    Any solution please?
    I was thinking of taking the audio out from the sound card, which
    sounds good, to the mic in of another sound card, and re-record at a
    better sampling rate.
    Problemn is that it is apparently not possible to run two sound cards
    simultaneously.
    Any help will be much appreciated.
    Thank you
    Johan Smit
     
  2. Gary Tait

    Gary Tait Guest

    Whereas On Fri, 03 Oct 2003 04:45:35 GMT, (Johan
    Smit) scribbled:
    , I thus relpy:
    How about play from the recorder to the souncard?
     
  3. Johan Smit

    Johan Smit Guest

    Hi,
    Thank you, no. The audio output has a lot of hiss, which is absent if
    the file is loaded to the PC.
    Regards
    Johan Smit
     
  4. In what way does it sound awful ?
    It could be related to the sampling rate and the conversion
    done on the way when the sound gets to CD. The CD is sampled
    at 44.1 kHz sample rate. If you convert the files you have with
    a good file converter to ones with 44.1 kHz sample rate, you
    should be able to get as good sound to the CD as those files give
    on playback.
    One possible solution, but somewhat hard I think.
    And with many soudncard with right settings you should
    be able to do this with one soundcard only.

    But generally what you can do with soundcard in this way,
    you can do with software. Try some good sample editing
    software how well it does the sample rate conversion.
    And do some filtering if needed.
    The PC hardware itself does not limit the number of soundcards you can use.
    The soundcard drivers and Windows sound system architecture could
    be the reson for this...
     
  5. Johan Smit

    Johan Smit Guest

    Very hard to describe, sounds like intermodulation between
    frequencies.
    What I have done now is to convert to 44.1Khz immediately.
    It still sounds awful then.
    Then low pass filter at 4 Khz. All the extra noises are gone then.
    The sound quality is then not hi-fi, but the best I can get it. At
    8Khz sampling rate, no more than 4Khz can be faithfully reproduced if
    I remember correctly. NyQuist? I forget, it has been years.
    Thanks for the help.
    Regards
    Johan Smit
     
  6. JeffM

    JeffM Guest

    You could always set up a Linux box and run cddarec.
     
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