Downsampling the bitrate of an MP3 file

From today’s mail bag:

Having recorded my first interview at a high bit rate of 320 kbps, I need to reduce the size of the file in order to send it to a transcriber. (It weighs in at over 100 mb!)

I am on a Mac. I know I can use use DropStuff to compress the file. Is there another way to reduce the size — i.e., the bit rate?



Filed under Apple Software, Mail Bag

2 responses to “Downsampling the bitrate of an MP3 file

  1. Open iTunes and set your desired MP3 encoding rate in the iTunes Preferences window. Here are the instructions for doing so from the iTunes Help menu:

    1. Choose iTunes > Preferences, click Advanced, and then click Importing.
    2. Choose MP3 Encoder from the Import Using pop-up menu.
    3. Choose Custom from the Setting pop-up menu.
    4. In the dialog that appears, choose your desired settings from the list.

    After selecting your bitrate and configuration options, import your MP3 file into your iTunes library. If your iTunes library contains personal music and audio that you want to keep separate from your professionally produced interviews, you may want to uncheck the box located on the Advanced tab of the iTunes Preferences window that is labeled, “Copy files to iTunes Music folder when adding to library” before you import the recording into iTunes.

    After importing your MP3 file, use your mouse to highlight the recording in your iTunes library and then select “Convert Selection to MP3” from the iTunes menu bar.

    Your converted MP3 file will now be formatted with your desired settings. You will see two audio files with the same name in your iTunes library–one that is your original and the other that is the converted version. To locate any iTunes file on your hard drive, choose File > Get Info (Command-I) from the File menu, then click the Summary tab. You will see the path to the file near the bottom of the Summary window.

  2. Pingback: Recent Links Tagged With "bitrate" - JabberTags

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