10.6

Table Of Contents
1015Logic Pro User Guide
MP3 preferences in Logic Pro
MP3 preferences let you control bit rate, quality, stereo mode, and other MP3 options.
Bit Rate (Mono/Stereo) pop-up menus: You can choose bit rates between 32kbps
and 320kbps. The defaults are 80kbps mono and 160kbps stereo. These rates offer
acceptable quality and good file compression. If you can afford the increased file size,
you should choose 96kbps for mono and 192kbps for stereo streams. These settings
deliver better audio quality. You can choose even higher rates, but the quality of
improvement in bit rates above 96/192kbps is minimal.
Use Variable Bit Rate Encoding (VBR) checkbox: Variable Bit Rate (VBR) encoding
compresses simpler passages more heavily than harmonically rich passages, generally
resulting in better-quality MP3s. Unfortunately, not all MP3 players can accurately
decode VBR-encoded MP3s, which is why this option is unselected by default. If you
know that the audience for your MP3 files can decode VBR-encoded MP3s, you can
select this option.
Quality pop-up menu: Keep this set to Highest whenever possible. Reducing the quality
accelerates the conversion process, but at the expense of audio quality. This option is
only accessible when the Use Variable Bit Rate Encoding (VBR) checkbox is selected.
Use Best Encoding checkbox: If you deselect this option, you gain encoding speed at
the price of audio quality. Keep selected, unless conversion time is an issue.
Filter Frequencies Below 10Hz checkbox: Frequencies below 10Hz are removed,
leaving slightly more data bandwidth for the frequencies that humans can hear,
resulting in an improvement in perceived quality. Such frequencies are usually not
reproduced by speakers, and aren’t audible to human ears. Only deselect this option if
you’re experimenting with subsonic test tones, or exporting MP3s for whales.
Stereo Mode pop-up menu: Choose between Joint Stereo and Normal Stereo.
Depending on the original file, these settings may or may not offer any audible
difference. Experiment with both settings to determine your preference.