I monitor the audio going to my SignaLink. I hear occasional sounds going out to the external codec when they should be directed instead to my local speaker or Headphones. This is most frequently heard when a 'Connected to station' event happens, occasionally when 'Incoming connection request' event happens. The sound is coincident with the start of my digital transmission. It happens to my friend also. I hear some sounds on his RF occasionally, when I am not talking with him. We are both computer literate (Geeks) and know all about setting some devices for Default and others for Communications default. It seems that there is a race condition in the code someplace that tries to put out the sound at (nearly) the same time as it starts the digital signal. Check it out.
top of page
bottom of page
Please see: https://www.idahoares.info/comms_sound_card_setup.php
Be sure that you have not moved your USB cable to your radio or digital audio interface to a different port on your PC or USB hub, as that will cause Windows to assign a different COM port(s) and assume that the audio codec from the radio or digital audio interface is now your default PC microphone and speakers.
Do a Windows-R and then type mmsys.cpl in the Open: prompt and click OK. This will launch the legacy Windows sound control panel, and then you can ensure that your radio or digital audio interface is NOT marked with any green checkmarks. Green checkmarks should only be on your PC Mic and Speakers, to make them the default Windows sound source and sink.
Check the Playback and Recording tabs on the Windows sound control panel to get everything set up. On the Communications tab, check 'Do nothing' to prevent Windows from tinkering with your volume controls if it 'detects communications activity'.
It's helpful to go into the properties for your radio or digital audio interface on the Windows sound control panel, and rename the input/output to an easily recognized name that will be easy to distinguish when selecting the audio codec in various digital programs, like WSJT-X, VARA HF, and VarAC. Remember that those names will only show up if your radio or digital audio interface is connected to your PC and the radio and/or digital audio interface must be turned on. WSJT-X in particular, has a bad habit of returning your audio selection to the Windows default in its preference panel, if it doesn't find your radio or digital audio interface when you open the WSJT-X preferences panel with the radio or digital audio interface off or disconnected.
Also, make sure that for your radio or digital audio interface device properties in the Windows sound control panel that all compression and other sound enhancements are turned off, as they will interfere with your digital encoding/decoding. Likewise, use the USB/digital mode on your radio, instead of just plain USB. That should turn off any compression or Tx/Rx equalization that you may have set up for SSB audio modes on your radio.
not a bug. change yoru default windows audio device to your speakers.
closing this report.
This happens when the audio codec for SignalLink is set as the default speaker in Windows. Any sound output from applications or Windows will trigger the VOX on SignalLink and it will be broadcast.
Suggestions for preventing this from happening going forward:
digital applications signal transmission chain: go into the audio configuration of Vara HF/Vara 2M, WSJTX, FLDIGI, etc. and select the Output device to pick the CODEC of your SignalLink.
Digital, logging, helper applications audio alerts: go into the audio configuration and for any alert or voice announcements select the specific device of the “speaker” that you want to output. example apps would be : VARAC, Fldigi, Gridtracker, and your logging app.
Always check what Windows has selected as the default speaker before operating. Before you operate verify that Windows did not select the SignalLink as the “default speaker”. If it did change the output to the speaker you want Windows to output on.
I hope this helps and let me know if you have any issues.
Jason
K3JSJ
Just curious, are you're using VOX to trigger the transmit? I've seen something similar