used without the acoustic rain active and in fact is needed for the routing of all 3d processed sound the 3 d mixer module 145 has functions that are much different than standard mixing boards one such function is that the output track selection for each of the eight faders volume controls can be selected for unique panning example standard settings are seen as tracks 1 amp 2 3 amp 4 5 amp 6 7 amp 8 etc in place of that system each track can be selected individually for example in the 3 d mixer module of the present invention tracks 1 amp 3 or 1 amp 4 2 amp 6 2 amp 7 2 amp 8 3 amp 8 may be chosen for a given channel depicted in fig2 is an 8 channel 3 d mixer module 145 control the 8 channels are fed by tracks 1 amp 3 1 amp 3 1 amp 2 5 amp 6 5 amp 6 7 amp 8 7 amp 8 and 3 amp 4 respectively this track selection functionality allows for unique panning needed for two reasons one dolby 39 s type of speaker track assignment has made most panning unusable or complex at best example 1 is the left speaker 2 is the center speaker and 3 is the right speaker in this example simple left right panning from 1 amp 2 is no longer possible so the assignment must now be 1 amp 3 for simple left to right panning the second reason for this unusual panning track output assignment is for the reproduction emulation or creation of realistic natural reverbs and or acoustic rain in the case of reverb a natural reverb may be reflected from many points back toward the source and.