I justed stumbled over the question how I could get an i2s audio signal (1.8V) into my notebook.
I looked for some usb sound device offering such an input and didn't find a (cheap) solution.
It seems that it would technically be possible using an esp32 or some sbc like rock64 or raspberry pi to receive the data and send it out by wifi or bluetooth. But I'm not a programmer and didn't find a project I could build on.
I fear I overlooked some simple and cheap solution. Did I?