matrix888x8 matrix mixer. MixerPolyphonic. 2.4.45. Bogaudio website · User manual. Author: Matt Demanett. Author email: [email protected] ® • HDMI 2.0a compliant • Supports 4K2K@60 4:4:4 8bits • Supports HDR* (4K2K@60 4:2:0 10bits) • HDCP 2.2 compliant and 1.4 compliant • Wide frequency range: