Compressing an MP3 file

Posted on 2007-08-10
Last Modified: 2013-12-07
I use MP3 for spoken words, so sound quality if not so important.  But file size is.

I use Audacity, but it make the MP3 files quite large.

Is there a way to make Audacity create smaller files?  Or is there some compression program I can use?

I would consider making a ZIP file, but the size does not change much.  is there another way?

Question by:newbieweb
    LVL 10

    Accepted Solution

    What bitrate are you recording the MP3 at, the lower the bit rate the smaller the file size.  If it is just spoken word then you could get away with 64k quite easily.
    LVL 87

    Assisted Solution

    Actually for speech you can even go lower than that, like 16k
    LVL 22

    Assisted Solution

    If you just keep doing what your are doing in Audacity you can then re-compress the file in Windows Media Encoder, which is very good at this -- would you believe they go down to 7Kbps?
    The file will end up as a wma, but you can then convert it back to an MP3 in something like iTunes if you need to. Won't make that much difference to the quality at that rate.
    LVL 69

    Assisted Solution

    In addition to clipping a 15 to 30 second segment of the song you can change from stereo to mono. (cuts file size in half)
    Audacity has some extra plugins that may assist you,
    Audio Editing Tool -- Audacity (version 1.2.4b)

    MP3 cutter
    to make it 64 bit  go to file, preferences , click on file formats, click on Bitrate change to 64.

    there is also Sony Sound Forge 7  expensive and for the serious
    LVL 11

    Assisted Solution

    by:A. Cristian Csiki
    Mp3Resizer is created to optimize the capacity of your portable music player by reducing the size of mp3 files. This is especially useful when listening to MP3 files or MP3 Audio books on a mobile phone, MP3 player, Pocket PC, etc.

    Portable MP3 players dont usually have much memory, and of course, its a shame to waste precious megabytes.
    Its hard to refuse temptation to upload more music than possible.

    For example, a 5-minute 256kbit MP3 file will occupy approximately 9.15Mb. By recompressing this file to 80kbit, the file size is dramatically reduced to 2.86Mb.

    The output file size is more than three times smaller than the source file size! Using MP3Resizer, you can upload three times more music to your MP3 player than before.

    Please note, the reduction in size is achieved by recompressing the file with a lower bit rate. This may cause a slight degradation in audio quality. This application uses Lame, a high quality MP3 codec. A minimum bitrate of 64kbit is recommended for playback on a mobile phones MP3 player.

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