The Constant Bitrate (CBR), expressed in bits per second (bps), used for MP2 format during recording or CD ripping sessions.
This is the default encoding mode and the bitrate will be the same for the whole file. It means that each part of your mp2 file will be using the same number of bits. The musical passage being a difficult one to encode or an easy one, the encoder will use the same bitrate, so the quality of your mp2 is variable. Complex parts will be of a lower quality than the easiest ones. The main advantage is that the final files size won't change and can be accurately predicted.
Note that, depending upon the chosen input format, not all of the bitrate values are supported by TwoLame.
The full list of Constant Bitrates, supported by a certain frequency, can be obtained using the EncodeFormats.MP2.GetTwoLameEncodingBitratesCountEx and EncodeFormats.MP2.GetTwoLameEncodingBitrateEx methods.
This property is used only if the EncodeFormats.FormatToUse property is set to ENCODING_FORMAT_MP2 and the EncodeFormats.MP2.EncodeMode property is set to MP2_ENCODE_CBR
This property is the same as entering the -b <kbps> setting inside the Appendix D - TwoLame command line.
For further details about encoding in MP2 format refer to the EncodeMP2 class section.
For further information about available encoding formats see the EncodeFormatsMan class.