BlackRock Audio Adapter for Google Chromecast HDMI to HDMI + Audio (SPDIF + L/R Extractor) Allows you to pair your Google Chromecast with virtually any sound system Enables audio (such as Pandora) to stream with the screen still off. SPDIF Output Supports Upto 5.1CH Dolby Digital 5.1CH, DTS 5.1CH Audio; RCA Analog L/R Output Supports 2CH PCM Stereo Audio One HDMI Input to One HDMI Output, One SPDIF Audio Output and One RCA R/L Stereo Audio Output HDMI Supports Full HD 1080P + 3D; HDCP & CEC Pass Through; Video EDID Pass Through; Plug & Play