I am very, very interested in getting this i2s module to work with Omega.
Do you have a connection guide?

@sonus I've made some progress. On my module, it's needed to connect XMT (HW Mute) to 3.3V AND to connect FMT to Gnd.
The only remaininng issue I have is that i2s pin assgnemnt is not persistent. I have to type omega2-ctrl gpiomux set i2s i2s after every reboot.

@Lazar-Demin of course, I did. I assume otherwise I would had errors when trying to play internet radio.
Is Build177 OK? Shall I oupgrade to the absolutely latest build?

Yes, I performed all steps. I can the the card listed, no errors when I play internet radio, but no sound from the headphones

Has anyone tried it and succeded? I did everything according to the latest manual, connected BCLK, LCLK and DIN, but got no sound.

This guide MUST be included in the Omega2 documentation

Read the docs, everything is there and is explained clearly.
https://docs.onion.io/omega2-docs/gpio-python-module.html

You have to replace pi-style gpio calls by omega-style, eg instead of GPIO.output(9, GPIO.LOW)

use

status = gpio9.setValue(0)