Which owl made this noise?

I’ve tried to identify it on 10 different sites, but I can only narrow it down to a Long-eared Owl, or a Great Horned Owl. The pattern is different though. It went:

Hoo-Hoo, Hoo-Hoo, Hoooooo
Hoo-Hoo, Hoo-Hoo, Hoooooo

and it was always those five even calls. There was no vibration or screeching.

Thanks for your help!