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Enova DGX HDMI Boards
78
Instruction Manual – Enova DGX 8/16/32/64 Digital Media Switchers
Troubleshooting Audio
Before troubleshooting audio, it helps to understand how the system handles EDID information.
The source reads and adapts to the pre-loaded EDID on the DGX HDMI input connector.
The factory default EDID is set to support 2 channel L-PCM audio. This EDID can be modified by using one
of the methods described under “Possible Solutions” on page 78.
Audio Format Support on Enova DGX Boards
The following table indicates which audio formats are supported by specific Enova DGX boards.
* Dolby Digital and DTS support up to 48 kHz, 5.1 channels.
Note:
DVI Boards must have their EDID changed to support HDMI signals with embedded audio.
Important:
Because signals routed through HDMI, DVI, DXLink Twisted Pair, and DXLink Fiber Boards in an
Enova DGX Switcher feature SmartScale Technology, they normally produce a quality image. If the
installation has special scaling, EDID, or HDCP requirements, see page 172.
Audio Problems
The default EDID for input boards only supports 2 channel L-PCM audio. If a sources chooses to ignore this EDID and
send a format that is not in the EDID, the audio may not pass through the Enova DGX 8/16/32/64 at all or it may be
distorted. To present other types of audio formats to the source, a different EDID must be loaded (see the AMX EDID
Library at www.amx.com (search for EDID Library). If after changing the EDID on the input board, the audio is still
distorted or is not present on the destination device, then the device may not be capable of supporting the requested audio
format with the newly loaded EDID setting. In this case, a standard EDID should be used and the sources set up to only
pass the type of audio that the downstream destination devices can handle.
Checking for Support
One way to check if a destination supports a particular type of audio format is to capture the EDID using
DGX Configuration software’s EDID Programmer tab and paste the EDID data into a free-ware EDID reader program
(e.g., www.edidreader.com).
Possible Solutions
If you encounter audio problems, we recommend trying these solutions:
Use the EDID programming functionality in the DGX Configuration Software (see page 181) to read the
EDID from the destination device (see page 183) and to write it to the HDMI input on the Enova DGX
Switcher (see page 184).
Use DGX Configuration Software to write an EDID to the HDMI input on the Enova DGX Switcher that best
represents the downstream destination. Check the AMX EDID Library to determine if one of the custom
EDID files meets your needs. (The custom EDID files are variants of base EDIDs.) For additional
information on custom EDID files, see page 184.
Audio Format Support on Enova DGX Boards
Audio Format
B
o
ar
d T
ype
s
HDMI In
pu
t Bo
ards
HDMI Out
p
u
t Bo
ards
DVI Inp
u
t Board
s
DVI Outp
ut
Board
s
DXLin
k T
w
isted Pair
Inp
u
t a
nd O
u
tpu
t Bo
ards
DXLin
k Fib
er
Inp
u
t a
nd O
u
tpu
t Bo
ards
Aud
io In
sert/Ext
ra
ct
Exp
a
nsio
n Bo
ards
(o
n eit
h
er th
e inp
u
t
or th
e ou
tp
ut s
ide)
SC Optic
al
Ou
tp
ut B
o
ards
2 Channel L-PCM
6 Channel L-PCM
8 Channel L-PCM
Dolby Digital (AC3)
*
*
DTS (AC3)
*
*
Dolby True HD
DTS-HD Master