A fan blowing, set to the highest setting. There's a strong low end presence, interestingly. The recording was made from behind the fan so the air wouldn't blow into the mic directly. Recorded with a zoom h1.
By using a frequency filter by setting its oscillations in variable arrays on the piano preset - i was able to make most of these sounds. Also vocoding and feedbacks and feed throughs were happening. Then they were altered in audacity.