From ChatGPT:

Ice can make a variety of sounds, including cracking, crunching, tinkling, whooshing, groaning, sizzling, and roaring. The sounds ice makes depend on how it’s interacting with its environment, such as temperature changes, wind, waves, and icebergs.

None of these words come close to describing the sounds emanating from the frozen Sudbury River this morning. The closest thing I can think of is the sound made by a handsaw whose blade has been pulled into an arc and then released. I made several attempts to use my audio recorder to capture the sound with no success. Later in the day, Jeanine and I went for a walk along the opposite side of the river down to Fairhaven Bay, hoping to hear the ethereal song again. Once you hear this sound, you want to hear it again and again. It is yet another gift of the river for which we are grateful.