Kaj gre prek HDMI

For digital audio, if an HDMI device supports audio, it is required to support the baseline format: stereo (uncompressed) PCM. Other formats are optional, with HDMI allowing up to 8 channels of uncompressed audio at sample sizes of 16-bit, 20-bit and 24-bit, with sample rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz and 192 kHz.[21][45] HDMI also supports any IEC 61937-compliant compressed audio stream, such as Dolby Digital and DTS, and up to 8 channels of one-bit DSD audio (used on Super Audio CDs) at rates up to four times that of Super Audio CD.[45] With version 1.3, HDMI supports lossless compressed audio streams Dolby TrueHD and DTS-HD Master Audio.[45] As with the YCbCr video, device support for audio is optional.

Compatibility with DVI
Audio support

Since the DVI specification does not support audio-transport, an interoperability problem arises when an HDMI-source drives a legacy DVI-display (such as a PC monitor), or conversely, when a DVI-source drives an HDMI-display. While HDMI and DVI compliance rules ensure that a DVI video-connection can be successfully negotiated and established (via a mutually supported display mode), the audio signal must still be transported through means outside of the DVI connection. Typically, an HDMI equipped source will provide additional outputs for audio-only, such as line-level analog and SPDIF, which provide a baseline audio program (such as stereo PCM.) Likewise, when displaying video from an HDMI jack, an HDMI equipped display may support alternate audio-sourcing from a separate pair of analog-audio inputs. Provision for any of these compatibility mechanisms is entirely up to the discretion of the manufacturer, as they are not covered by the HDMI specification. As of 2010, nearly all HDMI equipped sources (set-top and media-extender boxes, Blu-ray/DVD players and PCs) provide separate analog audio outputs, and many HDMI-equipped televisions support alternate-audio input when sourcing video from an HDMI-input.

There are consumer adapters available to place between a DVI source and HDMI target which can insert a separate audio signal into an HDMI TDMS data stream.[94]