Down-mixes from stereo to mono file for mono encoding in MP3 format.
This property is used only if the EncodeFormats.FormatToUse property is set to ENCODING_FORMAT_MP3
This property is the same as entering the -a setting inside the Appendix A - Lame command line.
For further details about encoding in MP3 format refer to the MP3 object section.
For further information about available encoding formats see the EncodeFormats object.