Gefen TOOLBOX GTB-HD4K2K-442-BLK, User Manual

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The 4K Ultra HD 4x2 Matrix for HDMI provides the capability to switch between 2-channel
and multichannel audio output.
Selecting the Audio Mode
Use this audio mode when all displays (and/or other sink devices) support only 2-channel
LPCM audio.
1. Press and release the Audio button, using a paper clip or other pointed object,
to toggle between 2-channel and multichannel audio modes.
2. The LED indicator will display the current audio mode.
Supported audio formats
Audio Format Audio Format
LPCM 2CH LPCM 8-channel
Dolby® Digital Dolby® Digital Plus
Dolby® TrueHD DTS®
DTS-HD Master Audio™ MLP (PPCM)
Operating the 4K Ultra HD 4x2 Matrix for HDMI
Audio Modes
NOTE: In order for the audio channel mode to be selected, the
EDID switch must be set to the Int position. If the EDID switch is
set to the Ext position, then the Audio switch will have no effect
on the audio output signal. See Setting the EDID Mode for more
information on using the EDID.
NOTE: When the Audio Mode is set the 2CH, the internal EDID will
restrict the audio output to 2-channel LPCM, regardless of the audio
input format.
Press the Audio button to
switch the audio mode