User manual

Saving and Converting Audio Files
Nero Burning ROM 64
Fig. 20: mp3PRO window - Encoding options for MP3 and MP3PRO files
The following encoding options are available:
Settings area
Encoder quality
combo box
Specifies the encoder quality. Fast, Medium and Highest
entries are available. These settings specify whether you
place more value on fast encoding (Fast) or \more value on a
superior psychoacoustic encoder model for the very best
results (Highest).
Constant Bit Rate
check box
Selects a constant bit rate, i.e. the data flow per unit of time
and the quality of the saved data, is the same over the entire
audio file.
If the bit rate is small, less data is transferred, the file is then
small, but quality is lower. If the bit rate is high, more data is
transferred, the file size is then large, but the quality is high.
The default value of 128 for MP3 files is near CD quality.
Select the options in the combo box that affect the bit rate:
scan rate per second in kbit, scan frequency per second in
Hertz and the channels.
Variable Bit Rate
check box
Selects variable bit rate, i.e. the data flow per unit of time and
the quality of the saved data, adapts to the dynamic of the
audio file. The bit rate, for example, can be lowered at quieter
points in the track.
Select your desired quality level in the combo box.
Bottom area
Enable Mp3PRO
check box
Specifies the encoder method used.
If you enable the check box, an MP3PRO file is created
(*.mp3 file extension).
If you disable the check box, an MP3 file is created (also
*.pm3 file extention).