It is now relatively easy to get a full circle of direct sound in the horizontal plane for about four listeners with just four speakers. An Ambiodipole in front and one in the rear reproducing a 4.0 dual pair from an Ambisonics source or any 3D recording. For height if you need more than hall ambience you can add height speakers to taste and feed them them Z signals. It is like being in a concert hall with a full orchestra spread out in front and one in the rear behind you. If you rotate your head it is like rotating your head in a hall. If you stand up and face sideways, then you hear an orchestra to your right and one to your left just as in a real hall. However, if you are talking about far side objects then if you face sideways, the object may not seem to be directly in front of you. But this technology is a lot easier and cheaper to implement and has a significant wow factor. Lots of AES papers, links and demo tracks at www.ambiophonics.org
Also you may find that your bass problem is a lot easier to fix. Ralph Glasgal -----Original Message----- From: Sursound [mailto:sursound-boun...@music.vt.edu] On Behalf Of Sean Devonport Sent: Wednesday, August 07, 2019 2:38 PM To: sursound@music.vt.edu Subject: [Sursound] The Acoustics of Domes Hey there everyone! Hope you're all well. I wanted to ask if anyone on the group has experience setting up a multichannel rig for a dome setup? Specifically designed to play Ambisonics. I've been working with a team looking to build a VR hemispherical dome that can display 360 video alongside Ambisonic content. The design for the dome structure is complete and now we're just figuring out the sound component. The sound is meant to fit seamlessly, and no obstruction should be on the floor. The dome is roughly 7m diameter, and built out of a fibre glass type material. We're planning to have a two layer type sound setup, so with roughly 14 speakers per layer plus a voice of god and a sub so (14-14-1.1). I was thinking that it could be an interesting idea to mount the sub in the ceiling above the VOG position, my reasoning being that the sub should emanate evenly across the floor of the dome, and it would prevent the need to have multiple subs outside the dome structure on the floor. I've never setup in a dome before and I can imagine the acoustics must be a little strange. Upon watching this video ( https://www.youtube.com/watch?v=JpdRYv9xA9w), I seem to get the feeling the task may get quite interesting. I'm hoping someone may have some experience with this. Some problems that I think may occur: 1. A boomy bass at floor level. 2. Room resonances and standing waves that don't seem to be very well studied. I think first port of call for the Ambisonic setup is to ensure that each speaker is calibrated to be the same loudness and time delay at the listening position. From there, I've been looking into applying an averaged DRC filter over the entire listening space to each loudspeaker to try get the most accurate speaker response for the listening area although I know this is quite a tricky challenge. I'm hoping that the DRC may help to mitigate some of the room resonances, however, I'd love to get a second (or more) opinion on how this would affect the setup. Anyone with any advice or resources on this would be very much appreciated! Thanks in advance. -- Sean Devonport -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20190807/9d9 0f940/attachment.html> _______________________________________________ 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. _______________________________________________ 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.
