There is an important reason to maintain full Ambisonic capability to below 20Hz.
It is a MUSICAL one. Go to a service at a large cathedral with good organ. At the end of the service, the organist will play something to show off while everyone is leaving. You can walk around and listen at various positions without causing offense. On SOME pedal notes at SOME positions, you will experience 'pressure in the head' sensations .. on other notes and positions the experience is 'trouser flapping' .... Pressure & Velocity nodes in cathedral space A mono recording or single "high quality Sub" converts the pleasant 'trouser flapping' to unpleasant 'pressure in the head'. You need at least stereo, preferably at least 4 subs in a classic Ambi system (and a TetraMic recording) to reproduce these important aspects of an organ performance. This isn't about LF 'localisation'. It's about pleasant musical sounds. If the desired effect is Bruce Willis blowing up the universe, dinosaur footsteps or modern music (??), your single "high quality Sub" is sufficient. You can also achieve the same effect by having someone stand behind you wielding a blunt instrument at the appropriate moment. _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
