MP3 is an audio format supported by most portable media players and digital audio applications. It generally supports multiple bit-rate settings (e.g. 128Kbps) which determine the quality. While MP3 files are generally not as large as other formats such as WAV, they can take up a little bit of space, especially if you are uploading multiple files on a portable media player. Reducing MP3 file size can be accomplished easily using audio converter software, but keep in mind it might lower the quality just a little bit.
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Download and install a multi-platform (for both PCs and Macs) free audio converter program such as Switch Audio Converter. Converter programs allow you to adjust MP3 settings to reduce the size.
Launch the program after it has installed and click the "Add Files" button located on the top panel. Locate the MP3 file you want from the location where you have it saved on your computer, and click "Open" to load it to the source window of your program.
Select ".mp3" in the output format window because you are not changing the format. Click "Encoder options." Reduce the bit-rate to less than 128Kbps. A setting higher than 128Kbps, increases the file size. Select "Medium" quality setting. Keep in mind that reducing the bit-rate and quality setting will likely diminish the MP3 quality; therefore, avoid reducing the settings to exceptionally low levels (e.g. lower than 48Kbps).
Click "OK" to save the changes. Click "Browse" and select the output folder in which to save the file. Click "Convert." When the conversion is complete, the MP3 file size is reduced.
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