Custom Hdmi Edid Files For Handling Audio Concerns - AMX Optima Instruction Manual

Appendix E – EDID Programmer
11. Click the Open button to select the .edid file to be written to the DVI or HDMI input connector.
12. Click the Write button to write the EDID information to the DVI or HDMI input connector.
13. If applicable – Repeat any of the steps necessary for any of the other DVI or HDMI input
connectors.
14. Disconnect the DVI or HDMI cable from the PC and from the Optima DVI or HDMI board.
15. Disconnect the serial cable from the PC and from the Optima enclosure.

Custom HDMI EDID Files for Handling Audio Concerns

Since an Optima with an HDMI board(s) will be installed between multiple source and sink devices
which often support different video and audio formats, it is possible that neither the video nor the audio
routed by the switcher can be displayed on one or more of the destination devices. Customizing the
EDID content at the Optima input channels is one way to be sure that the formats provided by the source
are compatible with most/all of the destination devices.
The following files are supplied*:
The first group of files use 1080p (VIC 16) as the preferred (native) video resolution.
File Name
AMX_HDMI1_A1.edid
AMX_HDMI1_A1_basicAudio.edid
The second group of files use 720p (VIC 4) as the preferred (native) video resolution.
File Name
AMX_HDMI1_A1_720p.edid
AMX_HDMI1_A1_720p_basicAudio.edid
Troubleshooting Example
Problem:
One example is when a source device that selects the highest supported video and audio formats is
installed with a sink whose input is limited to 720p and basic audio. Using the default shipping EDID
content would result in 1080p and possibly either 192 k stereo, Dolby 5.1, or DTS 5.1 audio arriving at
the sink when a route was completed through the Optima. The end result would probably be neither
video nor audio.
Solution:
To fix this problem, use the EDID Programmer to reprogram the Optima input's EDID to the content
supplied in one of the files listed above. For the example given, the best choice would be the file named
AMX_HDMI1_A1_720p_basicAudio.edid.
* These files are located in the AutoPatch_EDID_Library file at www.amx.com (search for EDID
Library).
162
EDID File Monitor Name
Checksum
8D AMX_HDMI1_A1 Default shipped EDID content
EE AMX_0300_001
EDID File Monitor Name
Checksum
A2 AMX_0301_002
92 AMX_0300_003
Description
on each input. Supports audio
up to 192 k for L-PCM, 48 kHz
Dolby (5.1), and 48 kHz DTS
(5.1).
Supports basic audio only
(L-PCM 32 k, 44.1 k, and 48 k).
Description
Supports audio up to 192 k for
L-PCM, 48 kHz Dolby (5.1), and
48 kHz DTS (5.1).
Supports basic audio only
(L-PCM 32 k, 44.1 k, and 48 k).
Optima Instruction Manual