“Filter frequencies below 10 Hz” checkbox: When this option is selected, frequencies below 10 Hz (which usually aren’t reproduced by speakers, and aren’t audible to human ears at any rate) are removed. This should always be selected, unless conversion time is an issue. “Use best encoding” checkbox: Like the Quality parameter, if you deselect this option, you shorten the time needed to bounce the file at the price of audio quality. Reducing the quality shortens the conversion process, but at the expense of audio quality. Quality pop-up menu: Keep this set to Highest (the default) whenever possible. If you know that your target listeners can decode VBR-encoded files, you can turn this option on. Use Variable Bit Rate Encoding (VBR) checkbox: Variable Bit Rate encoding compresses simpler passages more heavily than passages that are (more) harmonically rich, generally resulting in better quality MP3 files.īecause not all media players can accurately decode VBR-encoded files, this option is off by default. Note that the higher the bit rate, the larger the file size of the bounce file will be. You can choose higher rates, but the quality improvement afforded by bit rates above 96/192 kbps is nominal. These rates offer acceptable quality and good file compression.įor enhanced audio quality, you can choose:
When you click MP3 in the Destination area, the following options are available:īit Rate (Mono/Stereo) pop-up menus: MP3 bit rates are available between 32 kbps and 320 kbps, but default to 80 kbps mono, and 160 kbps stereo. However, Split Stereo format is possible, even if the encoded MP3 file is set to Joint Stereo mode. This is because the MP3 format doesn’t support surround. Selecting the MP3 option in the Destination area automatically disables the PCM > Surround option. If PCM is unselected in the Destination area of the Bounce dialog, a temporary PCM file is created and used as a source for bouncing to MP3 or M4A, or for burning to a CD (depending on which options are selected). If the selected sample rate is higher than 48 kHz, a temporary copy of the PCM file (with a 48 kHz sample rate) is created before the project is bounced to MP3 format. Note: The MP3 format doesn’t support sampling rates higher than 48 kHz.
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