EarpieceMixer: change inverted mix to 1.0 and -1.0 (not 0.75 and -0.75)
EarpieceMixer: change inverted mix to 1.0 and -1.0 (not 0.75 and -0.75)

Tympan/Tympan_Library,Tympan/Tympan_Library,Tympan/Tympan_Library