Re: [Sursound] uhj and z
Is there a technical reason why z is never included in UHJ recordings? I suppose the simplistic answer to _not_ included would be channel count. As for _never_ included, the table at the base of the 'hierarchy' section of http://en.wikipedia.org/wiki/Ambisonic_UHJ_format#The_UHJ_hierarchy is probably a good start. Good luck with the 'alphabet soup' ... Michael -- Bearcat M. Şándor -- next part -- An HTML attachment was scrubbed... URL: https://mail.music.vt.edu/mailman/private/sursound/attachments/20131210/6d7fbb79/attachment.html ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] uhj and z
On 12/10/2013 08:20 AM, Bearcat M. Şándor wrote: Is there a technical reason why z is never included in UHJ recordings? yes. 2-channel UHJ is meant as a stereo-compatible encoding in two channels (let's ignore the 3 and 4 channel extensions of UHJ for now), that should be playable over a standard stereo triangle. on stereo speakers, you can obviously reproduce left-right localisation easily. so you need the respective ambisonic components W and Y to go into UHJ. if the story ended here, UHJ would just be a mid-side matrix. turns out you can also get _some_ sense of rear localisation (or at least enough confusion so that you don't localise it in front) if the two speakers play back a heavily correlated signal but with extreme phase shift (between 90 and 180° out of phase). so X (the front mminus back component in ambisonics) goes in as well, with some rather heavy-handed phase trickery. Z represents the up minus down component. there is no way to reproduce that with two speakers on a horizontal plane, and there exists no handy psycho-acoustic loophole as for X. hence, Z is dropped completely. -- Jörn Nettingsmeier Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio) Tonmeister VDT http://stackingdwarves.net ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] uhj and z
--On 10 December 2013 14:07 +0100 Jörn Nettingsmeier netti...@stackingdwarves.net wrote: once you toss 4 components into 2 channels, you can never perfectly separate them again. Reference: all other quad matrix systems ever. Paul -- Paul Hodges ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] uhj and z
True, but it's amazing what can be done ;-) Reference: all other quad matrix systems ever. Paul -- Paul Hodges ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com -- next part -- An HTML attachment was scrubbed... URL: https://mail.music.vt.edu/mailman/private/sursound/attachments/20131210/cf3a7e2e/attachment.html ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] uhj and z
On 12/10/13, 1:07 PM, Jörn Nettingsmeier wrote: ...once you toss 4 components into 2 channels, you can never perfectly separate them again. there will always be some sort of crosstalk Ah yes, the downfall of quad... --R ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
[Sursound] uhj and z
Is there a technical reason why z is never included in UHJ recordings? -- Bearcat M. Şándor -- next part -- An HTML attachment was scrubbed... URL: https://mail.music.vt.edu/mailman/private/sursound/attachments/20131210/6d7fbb79/attachment.html ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
