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Help with Sampling Frequency & Bit rate while recording sound...

Discussion in 'Recording' started by Nzyme1984, Nov 16, 2010.

  1. Nzyme1984

    Nzyme1984 Guest

    Hello guys,

    I am an audiophile and have a concern which I hope will be clarified. I have tried many sound recorders for my PC (Win 7) and many of them allow you to select the "Sampling Frequency" and the Bits per sample before recording. However, selecting larger values increases the size of the saved file and selecting smaller values has low audio quality. Now, how can I know what value should I select? Is there any program that can automatically adjust these values as in the input?

  2. TheJackAttack

    TheJackAttack Moderator Resource Member

    Mar 20, 2008
    currently Billings
    CD quality is 16bit/44.1KHz sampling. DVD quality is 24bit/48KHz sampling. SAC audio is 1bit DSD/2.8 Mhz. Basically you get to decide on what is the ideal rate for you, then either record or convert the files you have.

    Many audio engineers will record in the sampling rate of the destination format or multiply that destination format by 2. For instance, I usually record at 24 bit/88.2K and then convert down to CD upon completion of the project when I burn the media for the client. Yes files get big. That's why all the kids these days use compressed MP3 files.
  3. drumrob

    drumrob Active Member

    Jun 2, 2004
    Eugene, Oregon
    John has provided good information, as usual. One small correction, though. The standard for audio on regular DVD is 16bit/48kHz. DVD-Audio and Blu-ray discs allow 24-bit/192kHz.

    Have fun!

  4. denitronik

    denitronik Active Member

    Jan 29, 2010
    Dorval Quebec Canada
    Some prefer to recording at the same format as the target to avoid sample rate conversion (for example record at 44.1k/16bits for a CD).
    The other way is to record at the highest format possible and sample rate down to your target format. (for example record at 96k/24bits).
    I prefer the later.
    First of all, recording at 16 bits does not give you enough dynamic range (IMHO), specially if you record live instruments. Recording at 24 bits gives you enough headroom so you don't need to compress your signals when you record.
    Secondly, there are some very good sample rate conversion algorithms today (for example Izotope's) that do an excellent job of sampling down and some very good dithering algorithms also to convert from 24 to 16 bits.
    Thirdly, storage is cheaper and cheaper and CPUs are faster and faster; so what if your files are bigger and need more CPU power to handle.
  5. Unregistered

    Unregistered Guest

    i got the best mic ever here

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