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Audio output
Audio and video belong together in HDMI and are processed separately only in the HDMI sink. If
an audio device shall output sound, it must usually also support the video signal. But the Matrix
Switch can extract the sound from the video signal and output it separately.
The Matrix Switch always outputs the audio and video data synchronously, and without any delay.
However, the processing time in 2 HDMI sinks may be different. Especially video processing takes
more time than just audio. If the audio does not play in sync with the video, you can adjust your TV
sound system. To compensate this common issue look for lip-sync / audio delay in the menu.
Audio Formats
The supported audio formats are negotiated between the devices. You can only influence this to a
limited extent via the EDID control. On some HDMI sources, you can set the audio output manually.
Please note the following:
•
HD audio formats such as Dolby Digital Plus, Dolby TrueHD or DTS-HD (also Dolby Atmos /
DTS-X) cannot be transmitted via SPDIF. So if you do not have sound there, select another
sound format (stereo or Dolby Digital Bitstream).
•
If you want to use HD sound formats, select EDID mode PASS. All active HDMI sinks must
support 7.1 sound formats. Connect your AV-Receiver via HDMI.
•
Via HDMI ARC, 5.1 or 7.1 sound can only be transmitted via Dolby Digital Plus. Not via
Multichannel PCM (Dolby MAT), Dolby TrueHD or DTS HD Master Audio.
•
There are many soundbars that have only one HDMI ARC connector. This is not a real HDMI
input! You cannot connect such a soundbar directly to an HDMI output. You can only connect
it to the HDMI INPUT of your TV marked „HDMI ARC“. If you want to connect such a soundbar
to the matrix switch, please use SPDIF connection.
HDMI cable
Note that the higher the signal data rate, the more critical the cable length becomes. This is
because the bandwidth requirement increases and higher frequencies are used. The higher a
frequency is, the more it is attenuated. For the highest data rates of 18 Gbps (equivalent to an
Ultra-HD 60 Hz signal), we recommend a maximum cable length of 3 m at the inputs and 5 m at
the outputs. For longer ranges you can use special HDMI cables with fibre optic or active cables.
Caution:
Make sure that the HDMI plug contacts are not dirty or damaged when connecting or
disconnecting the HDMI cables. Make connections without power and switch on the devices only
after connecting them. Please also pay attention to a good quality of the HDMI cables. Good
cables usually have a large diameter.
