Hi. Im have set up my DRAWS hat/FT817 according to "temporarily Offline" youtube video.
Install good WSJT-X good CAT good\ - PTT band change etc. RX good - waterfall/decode etc great. I set my WSJT-X audio to in/out toplughwCARD=udrc.DEV=0 Seems my only problem is audio from HAT to FT817 as while rig goes to TX, no audio drive. Radio is all OK as I use it for Win/FT8 SSB etc.
I do not know where to look for audio output drive adjust on the Pi/HAT/WSJT-X steup