step by step how to
1: download Audacity,link here:
http://audacity.sourceforge.net/2: open audacity, then load your song.
3: Trim your song to be looped, if its to long it wont work.
4: once your loop is trimmed go to a little arrow at the far end to your left, click it, then click "split stereo track"
5: this step aint to deferent, look the the arrow on both channels and click mono on both of them
6: once that is done save as ogg vorbis to your blockland's music folder.