Ok I think I know what you mean now. you could still do this still in max msp with panning (sort of) by feeding the headtracking coordinates into the program and getting them to "rotate" the sounds in the panner you want to make static so they appear to maintain the same relative position when you move your head, cheers, Gus
On 27 March 2016 at 12:56, Dave Hunt <davehuntau...@btinternet.com> wrote: > Hi, > > I'm curious as to where "normal" stereo at plus and minus 30 degrees comes > from. > > Most "stereo" microphones use two cardioid capsules at 90 degrees (plus > and minus 45 degrees) or wider. MS and ambisonics derive from Blumlein, the > first using a central cardioid with a figure-8 at right angles to it, and > the latter with an omni-directional pressure microphone and figure-8 > microphones at 90 degree separation. Most mono panpots use a sin/cosine law > based on 0 to 90 degrees. The only argument for plus and minus 30 degrees > I've heard was based on a potential "hole in the middle", that I have never > really encountered, and screen-based media which favour a narrow audio > image to match the narrow visual image. 5.1 seems to have legitimised the > zero, plus and minus 30 degrees, and plus and minus 110 degrees (more side > than rear) heresy. > > Even our own ears are not at plus and minus 30 degrees, more like plus and > minus 75 degrees or larger separation. > > Others, including I think Robert Green, have argued for 90 degrees instead > of 60 degrees. > > "Normal" stereo via UHJ to B-format, does reveal spatial information > beyond left and right in stereo recordings. Spaced omni recordings, of > course, have no definite spatial directionality. > > Ciao, > > Dave Hunt > > From: Eero Aro <eero....@dlc.fi> >> Date: 26 March 2016 12:36:42 GMT >> To: sursound@music.vt.edu >> Subject: Re: [Sursound] Static stereo source in rotating soundfield, >> possible? >> Reply-To: eero....@dlc.fi >> >> >> >> Hi >> >> When you use two channel stereo in the 360 soundfield, pay attention to >> two >> things. >> >> If you pan the Left and the Right channel of the stereo into directly >> opposite directions, >> say + 90 and - 90 degrees (to left and right), you basicly lose the >> directional cues. >> What you hear is a very spacious sound image. You cannot detect the >> directions of individual phantom sources. If this is what you need, do >> it. It's about >> the same which directions you use, as rotating the opposite panned stereo >> doesn't >> change the illusion practically at all. This technique has been used with >> dummy head >> recordings, and yes, it is spacey, but no good sense of directions. >> >> If you wish that a stereo image is located somewhere around you, it is >> better to pan the >> Left and the Right channel to some certain angle from each other. Try >> first >> panning the stereo channels to + 30 and - 30 degrees in front, as in a >> normal two >> loudspeaker stereo. You will notice that it sounds a little bit like two >> channel stereo, >> but with worse localization, at least in first order Ambisonics. You can >> then rotate this >> "sector" to some other direction. At the back and at the sides the >> localization is >> not as good as in the front, and it is usually better to narrow down the >> sector. >> This is not because of Ambisonics, it's because our hearing localizes >> phantom sources >> from loudspeaker playback in that way. >> >> I have used this technique in "smearing" the localization of a panned >> mono signal. >> The mono is panned into some direction and the stereo reverb or delays of >> that >> mono signal panned into both sides of the mono image. >> >> if this is the equivalent of fitting a square peg into a round hole... >>> >> >> Or "drilling a square hole with a triangular drill"? :-) >> >> Not at all. I think your question is very relevant and welcomed. I wish >> there would >> be more discussion about how the soundfield is used in real life. >> >> Eero >> > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > https://mail.music.vt.edu/mailman/private/sursound/attachments/20160327/b7c1f36b/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. > -- Augustine Leudar Artistic Director Magik Door LTD Company Number : NI635217 Registered 63 Ballycoan rd, Belfast BT88LL -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20160327/0993bbbc/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.
