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WSJT-X / JTDX stops sending TX Audio to the Radio after sitting idle for a while.
TLDR (Too long Didn't Read, summary)
If you are using a HDMI Monitor, but are not using the tv/Monitor's internal speakers, and you experience the loss of WSJT-X / JTDX TX Audio after things have sat idle for several hours:
DISABLE the HDMI Sound Drivers for the TV/Monitor. This will prevent Windows from reshuffling the audio devices when the TV/Monitor goes into "Sleep Mode" which results in WSJT-X / JTDX "forgetting" how to access the DAX Audio TX Device.
I have had this issue for some time. I had thought that it was an issue with WSJT-X / JTDX.
I often run three instances of WSJT-X on my 6600M and let it monitor overnight or for long periods of time after hours when I am not in the shack.
I use a TCL 50" ROKU 4K TV as a computer monitor. Whenever the computer shuts off the monitor or goes to Screen saver mode, the TCL disconnects from the computer and starts showing its own screen saver display.
Many times when I return to the shack and "Wake up" the monitor/TV I find that WSJT-X will no longer send audio to the radio through the DAX Audio TX stream.
If I restart WSJT-X, or change to a different configuration, the DAX TX Stream becomes active again.
I can also regain access by changing the WSJT-X "Settings Audio Output" to a different DAX device and back again to DAX Audio TX.
What was happening was that when the TV/ Monitor went to Sleep Mode, the HDMI Sound drivers essentially went to "sleep," too and the Windows Sound system renumerated the sound drivers/devices. When this happens, WSJT-X is no longer able to "find" the "DAX Audio TX" device.
I finally learned the solution:
Since I do not use the computer's HDMI Audio feed to the TV (I use some nice BOSE Speakers) I simply opened "Device Manager" and disabled the HDMI Audio Drivers for the TV.
Now, when the TV monitor "goes to sleep" nothing changes in the Windows Sound Drivers and devices and I don't lose the Transmit Audio when I "wake" it back up.
(NOTE: Simply disabling the HDMI Audio DEVICES rather than the DRIVERS may have been enough. But this is what I tried and it seems to work.)
I hope this helps if you have been experiencing "Random" loss of TX Audio from WSJT-X.
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