...
The HDMI®-out connector is used to send digital video and audio to HDMI-enabled sink devices. XC2055 has two HDMI outputs and the XC4055 has four HDMI outputs. One of the HDMI outputs on each device type is HDMI 2.1. CEC control is supported over each HDMI interface independently, and it can maintain the configured multiscreen layout if one of the HDMI outputs loses sync.
...
The XC2055 and XC4055 have a combination an analog /optical audio jack. To transmit a digital audio signal, use a TOSLINK optical audio cable with a 3.5mm connector. Analog and digital audio cannot be transmitted simultaneously. Dolby audio is supported as a paid license.
The analog audio connector has the following pinout:
...