A song by Darkest Of The Hillside Thickets. It has five verses. The first three are 'Yog-Sothoth', repeated four times, plus a bonus Sinister Whisper. The fourth is like the first three, minus the whisper. The fifth is a melody part, with Yog-Sothoth repeated eight times by a chorus. Making, in total, twenty-seven Yog-Sothoths. There are no other words that I can make out.
The faithful keep it playing constantly in the hope that, someday, somehow, if it is played enough times, the Gateway will actually open.