For those far away from Slovenia, is the broadcast available over the internet (I know, I know)? This link says it's not available because of "regional restrictions":
How well does this work with lossy compression? I would trust only lossless formats and analog with digital data encoded as audio, but I have zero hands-on experience with this
The bit rate of a speccy tape recording was only about 1500 bps, and we routinely recorded on the cheapest tapes, and tape machines that were little better. I'm sure it'll be fine.