The folks over at the HPL Historical Society (need to think about getting a lifetime membership: $75 is a lot of discretionary income, though) helped put together a rock opera based on one of Lovecraft’s short stories (‘The Dreams in the Witch House,’ obviously). I just picked up the album (Dreams in the Witch House: A Lovecraftian Rock Opera), largely on the strength of this (DO NOT CLICK THAT LINK YET!) music video – but please note that I am putting a content warning on said video, which I do not often do. This is a rock opera based on a horror story, and the video features images of a disturbing and alarming nature that are all the more so because they are not done in a cartoonish fashion. Do not watch this at work. You have been warned.
I get the impression that the HPLHS might be expanding this, later on (they’ve already done the radio dramatization of the story).