2.10.21
-there is now a option for the speaker configuration in the music settings.
mono , stereo , stereo virtual 3d , prologic souround , quad speakers , 5.1 surround , 7.1 surround. default is stereo becouse of performance reason. the virtual 3d sound needed / needs more cpu power.
-virtual 3d surround cpu performance improved by switching off 3d calculations for silent / low volume sounds.