The files you find here are sample asound.conf configuration files with the hardware configurations I have run tidal-connect on, or that user have tested successfully.
Choose one that matches your hardware (if any), or create a new one. Follow the naming style <ASOUND_FILE_PREFIX>.asound.conf, then set ASOUND_FILE_PREFIX to the relevant prefix.
Example, in order to select a file name topping-d10-softvol.asound.conf, set ASOUND_FILE_PREFIX to topping-d10-softvol.

I have added three presets, hdmi-rpi, hdmi-rpi-44 and hdmi-rpi-48.
The hdmi-rpi and hdmi-rpi-44 worked for me on my Sony tv, however I had to limit audio quality to 16bit/44.1kHz, otherwise this would fail when trying to stream hi-res content.
Enable one of these presets by setting (e.g. for the 44.1kHz variant):

ASOUND_FILE_PREFIX=hdmi-rpi-44

to your .env file. Do not set CARD_NAME or CARD_INDEX when specifying an asound file. There is also another set of presets, named hdmi0-rpi, hdmi0-rpi-44 and hdmi0-rpi-48 which should work with Raspberry Pi 4, which has two hdmi outputs, thus different card names (vc4hdmi0 and vc4hdmi1 instead of only vc4hdmi).