Nero 9 Manual page 52

Check box
Use .m4a exten-
sion for writing
files
6.6.1.5 OGG Vorbis Encoding Options
Nero Burning ROM can encode audio files of an Audio CD in the OGG Vorbis format.
Set options in the OGG Vorbis Settings window that you can open in the Encode Files
window via the Settings button. Ensure that you have selected OGG Vorbis as the Output
file format.
The following setting options are available in the OGG Vorbis Settings window:
Check box
Constant Bit Rate
Check box
Variable Bit Rate
Encodes the audio files in the M4A audio file format; which was de-
fined by Apple.
Specifies a constant bit rate, i.e. the data flow per unit of time and
thus the quantity 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 is near CD quality.
Specifies a variable bit rate, i.e. the data flow per unit of time and
thus the quantity of the saved data adapts to the dynamics of the
audio file. The bit rate, for example, can be lowered at quieter points
in the track.
You can set the variable bit rate between 0 and 100. 0 means the
lowest, 100 the highest quality.
Nero Burning ROM
Audio CD And Audio Files
52