see title & spectrogram ... https://cdn.freesound.org/displays/705/705407_1015240_spec_L.jpg
If you need something stronger, see ... https://freesound.org/people/Timbre/sounds/119953/
October 11th, 2023
blurrier rising Shepard-ish remix of Freesound#421669 (now stereofied)
blurred rising Shepard-ish remix of Freesound#421669
IMO best bit from 6:15 - 7:50
March 12th, 2018
stringy droney horror build-up.
If you need something more subtle, see ... https://freesound.org/people/Timbre/sounds/705407/
May 6th, 2011