Problem Explanation：
1、Prepare SPDIF digital coaxial audio cable with DTS and Dolby decoded amplifier.
2、Connect the LOTUS head of SPDIF digital coaxial audio line to the power amplifier input end first, and connect the 3.5mm head to the Audio Out output end behind the projector.
3、Enter Settings-Sound-Output and sets the output mode to S/PDIF.