Audio Only Quality Settings
To view the settings for a preset Audio Only profile, click its title from the File Format Profiles page.
Note: settings for preset profiles cannot be changed.
To create a new profile, click the Copy profile link for one of the existing options.
Name: The name of this audio profile.
Audio Format: The format of this profile. Options are MP3 and WAV.
Audio Bitrate: The approximate bitrate (bits per second) for this profile. Note: this option will not appear if the Format selected is WAV.
Audio Sample Rate: The sample rate of this audio profile.
Once you are finished editing the profile, be sure to click the Save button.