Apple Logic Pro 9 - Manual (Page 1286)

• 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: Like the Quality parameter, if you deselect this option, you
will gain encoding speed at the price of audio quality. This should always be left on,
unless conversion time is an issue.
• Filter Frequencies Below 10 Hz checkbox: When this option is selected, frequencies below
10 Hz (which are usually not reproduced by speakers, and are not audible to human
ears at any rate) are removed, leaving slightly more data bandwidth for the frequencies
that humans can hear, resulting in an improvement in perceived quality. Only deselect
this option if you’re experimenting with subsonic test tones, or exporting MP3s for
whales.
• Stereo Mode pop-up menu: You can choose between Joint Stereo or Normal Stereo in
this pop-up menu. Depending on the original file, these settings may or may not offer
any audible difference. Experiment with both settings to determine your preference.
Audio Reset Preferences
The Reset pane enables you to send reset messages of a specified type to all active
instrument channels. This can be useful if you are encountering hung notes, or are finding
that controller settings are incorrect when in Cycle mode (or when returning to the
beginning of a section or the project start point).
• “Control 64 off (Sustain)” checkbox: Sends “Control 64 off (Sustain)” reset messages.
• “Control 1 (Modulation) to zero” checkbox: Sends “Control 1 (Modulation) to zero” reset
messages.
• “Pitch Bend to center position” checkbox: Sends “Pitch Bend to center position” reset
messages.
1286 Chapter 44 Preferences in Logic Pro