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Monoprice Blackbird 4K Series 7.1 HDMI Audio Extractor - Monoprice.com
J-Tech Digital 4K60HZ HDMI Audio Extractor/Converter SPDIF/3.5MM
HDMI Audio Extractor & Embedder | Gofanco
Simplified MFG DAC1 HDMI audio extractor with multi-channel-to-stereo downmixing at Crutchfield