As for my past post above, I carefully extracted the sound layer of the amazing organ performance into 96 kHz 24 bit aiff, then analyzed by Adobe Audion 3.0.1.
View attachment 231966
I could clearly confirm that the "meaningful" low sound goes down to 16 Hz -
18 22 Hz zone, even though I do not know whether the 16 Hz -
18 22 Hz sounds are direct huge-pipe sound or some Helmholtz hall-air resonance caused by stimulation of the high gain pipe sound of 32 Hz or higher. By looking at his pedaling actions, the latter would be highly possible.
I can clearly hear such low sounds using
my latest mutlichannel multi-amplifier full-active audio setup with 0.1 msec precision time alignment throughout the SP drivers.
As a whole, the amazing sound of this YouTube clip is nice challenge and reference to my/our audio system and room acoustics.
Today, I could not find the details of the organ,
"Hauptwerk-Organ of Joerg Glebe, Bochum". I would highly appreciate if someone here on this thread would find and share the details of this organ, especially the info on the size and resonance Fq of the low to lowest huge pipes.