upmix to 5.1 DSP - what is the algorithm? 2020-12-31 22:09:54 I use the Upmix to 5.1 DSP plugin all the time and it works great. But... what is the algorithm? I know it takes the stereo channels and mixes them using some proportions into the 5.1 channels. But what are the proportions?How much of each stereo channel goes into each 5.1 channel?