With Nero SoundTrax you can create 5.1 and 7.1 surround projects. These numbers correspond to playback with a surround system with 5 or 7 speakers plus subwoofer.
In addition to two different types of surround projects, Nero SoundTrax offers the selection of the number of speakers: 
 
 
 
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Projects in which all speakers will be addressed with one sound track
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Projects in which all speakers will receive a separate channel
In addition you can insert an automatically generated LFE channel in the project.  
You can edit individual tracks in a surround project exactly as any other track.
LFE channel
A Low Frequency Effect channel is used for transmitting low frequency sound via a special low frequency channel that is specially reduced in its bandwidth. The bandwidth is limited to the bases and thus to frequencies between 20 Hz and 100 Hz. The LFE channel is used in various multi-channel sound systems. Because of its limited bandwidth it is not counted as a full channel in the designation of multi-channel sound systems but as a suffix marked as “1″(e.g. 5.1).


Surround Projects