84   // Special case for 5.0, 5.1 with back channels when upmixed to 7.0, 7.1,  in ChannelMixingMatrix()
85   // which should map the back LR to side LR.  in ChannelMixingMatrix()
181   // Mix back LR into: side LR || back center || front LR || front center.  in CreateTransformationMatrix()
184       // If the input has side LR, mix back LR into side LR, but instead if the  in CreateTransformationMatrix()
185       // input doesn't have side LR (but output does) copy back LR to side LR.  in CreateTransformationMatrix()
190       // Mix back LR into back center.  in CreateTransformationMatrix()
194       // Mix back LR into front LR.  in CreateTransformationMatrix()
198       // Mix back LR into front center.  in CreateTransformationMatrix()
204   // Mix side LR into: back LR || back center || front LR || front center.  in CreateTransformationMatrix()
207       // If the input has back LR, mix side LR into back LR, but instead if the  in CreateTransformationMatrix()
208       // input doesn't have back LR (but output does) copy side LR to back LR.  in CreateTransformationMatrix()
213       // Mix side LR into back center.  in CreateTransformationMatrix()
227   // Mix back center into: back LR || side LR || front LR || front center.  in CreateTransformationMatrix()
230       // Mix back center into back LR.  in CreateTransformationMatrix()
234       // Mix back center into side LR.  in CreateTransformationMatrix()
238       // Mix back center into front LR.  in CreateTransformationMatrix()
243       // Mix back center into front center.  in CreateTransformationMatrix()