RPi4, Haupagge & tvheadend with LibreElec 10

I'm trying to put together a RPi4, Haupagge WinTV-DualHD tuner to replace my current setup of an RPi3 running LibreElec /Kodi and an RPi3 with TVHat running LibreElec & TVHeadend (OK I know KODI is there as well). The idea is to go from two machines to one. I've been having difficulty with v10 of LibreElec some freezing and no audio. I've just downloaded v9.2.8 LibreElec to try. I had v4.3 TVHeadend server and 4.2 client.

Does anyone have suggestions for a known working setup?

ps I'm good with Windows but not Linux so if I need to download / run commands please remember newbie here.

Just installed Raspberry Pi OS desktop on another SD card and I do get audio when playing the same film in VLC in that. Is there a hidden setting somewhere I'm missing?

Found the setting - I now have noise with my film. Just need to sort out freezing whilst recording and watching films now.

Thanks for that.

Currently I'm just trying to get sound via the HDMI cable - I found a setting that generates sound through the headphone jack but not HDMI - OK for testing on a monitor but not much use for a TV

Something I did, not sure what but I'd really like to know, seems to have worked and I now have sound from the HDMI cable to the TV.