Small MP3 File Sizes

Discussion in 'Audio' started by tgodc, Aug 7, 2004.

  1. tgodc

    tgodc Member

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    OKay, I came across a site the other day and it had a 7 MINUTE mp3 file and was only 800kb in file size. It was decent enough to listen to and was pretty good quality. Anytime i convert a WAV to Mp3 file it only halves the size of it.

    Is there a program for creating small Mp3 files? I would appreciate any help towards this as my MP3 sizes are out of control compared to this.

    Thanks in advance.
     
  2. The_OGS

    The_OGS Active member

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    A typical 128Kbits/sec MP3 has a compression of more than 10:1 over Redbook-standard CD WAV.
    A good rule of thumb is about a meg a minute, so your MP3 is compressed much more than this - maybe another factor of 10 ;-(
    Your small audio file is probably MPEG-II not MPEG-I.
    The difference is the sample frequencies of the input file. MPEG-I can handle input streams (WAV files) with a sample frequency of 48000, 44100 and 32000 Hz. MPEG-II on the other hand will support stream for 24000, 22050 16000 Hz. Basically, use MPEG-II when you want to encode with low bit rates (ie. for voice files, or if you need small MP3 files with reduced quality).
    Also, the lowest bit-rate for MPEG-II is 8 Kbits/sec while for MPEG-I the lowest bit rate is 32 Kbits/s.
    A quick calculation shows your MP3 is approx 16 Kbits/s. I'm sure it is mono if it sounded not too bad!
    You can easily make these yourself with CDex.
    100:1 compression is a little greedy though... (LoL)
    http://cdexos.sourceforge.net/
    Let us know how you make out :)
     
  3. tgodc

    tgodc Member

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    I got CDEX, but how do i set the different frequency and ratio rate?
     
  4. shiroh

    shiroh Guest

    seems the OGS made his point clear.
    my 2 cents

    ogg vorbis at 48kbps beats any encoder of mp3 at 32kbps by a mile.
     
  5. tgodc

    tgodc Member

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    i just found a way using Sound Recorder to convert a WAV to MP3 at 64KBPS. It drastically decreased the file size.
     

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