A quotation from Outside magazine (online) describes these sounds: "Ice sings and plays music when it is in a dynamic phase of freezing or temperature change. The larger the lake, the more varied the sounds. (...) Fresh black ice growing on a large lake sounds remarkably like the recorded songs of whales at sea."
What I now call "song" is yet another thing. Temperatures around zero (Celsius) in these days, a thin layer of ice covers only part of the surface of the lake and there are cracks and floating pieces. The southwestern wind makes the little pieces of ice clink against one another... and this slightly melancholic jingle is the autumn song. :)