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What is SPDIF & Optical? (SPDIF vs Optical): Comparison
ANDROID TV BOX - OPTICAL SPIDF VS 3.5MM DIGITAL SPDIF COAXIAL - YouTube
S/PDIF Toslink Digital Optical Cable - High Quality Audio For Your Home Theater - YouTube
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How to Use SPDIF Port || How to connect Audio from Optical SPDIF port of Setup box - YouTube