The message
from Gary Woods contains these words:
Jaques d'Alltrades wrote:

It has been shown that a lot of spooky places are 'haunted' by
infrasound - that is, low notes on or just below the audible range.

Something churches know; which is why those massive pedal-note pipe
organs...

Forgotten where it is - Albert Hall? Royal Festival Hall? St. Paul's?
has a 64 ft pipe which they daren't play in case it shakes the place
down.

I have thoughts along those lines using music generation software. I
have speakers which will handle infrasound.....

--
Rusty
Open the creaking gate to make a horrid.squeak, then lower the foobar.
http://www.users.zetnet.co.uk/hi-fi/