Installed SmartSDR 2.3.7 , updated WSJT to v1.9.3 and then discovered WSJT and Flex would not transmit.
Level controls on mike panel and WSJT both at MAX setting. No RF
DAX is selected on the TX panel on the right
DAX is set to channel one
Audio is selected just like above: Input RX 1, Output DAX audio TX
I'm going to scratch my head again.
I would check in the setup of WSJT-X and make sure the correct DAX is selected. I have had mine mysteriously change once or twice, probably something in Win10. I went in the sounds section of windows and unchecked the boxes that said "allow programs to make changes" or something to that effect. Hasn't happened since. There is a check box on each DAX device. Uncheck them all
I would also look at the transmit DAX in the sound control of Windows and make sure the level wasn't muted or turned down. Right click on your speaker icon and select "sounds"
Sometimes when this happens I need to do more in depth audio surgery on the DAX drivers.....