CIP Audio Player is a free and easy to use software that plays back PCM 16Bit/44.1kHz wav-files through the main speakers and center speaker by using different sound-mixer (sound-cards).
As an example you could connect the main and center signal to the pre-inputs (external decoder inputs) of a 5.1 AV-Receiver/Amplifier to apply the signal to the three front speakers (left, center and right).
