URL format and audio requirements ?

[neshala]

Is there some specs which URL format is valid, i have tried several and none is working except those provided in README - that one works fine for me?

I tried the following:

http://109.206.96.197:443/;&type=mp3
http://streaming.karolina.rs:8000/karolina
http://streaming.tdiradio.com:8000/tdiradio

It would be good to know is there some requirements in term of audio format and bitrate that needs to be satisfied in order to play FM.