Hi, boids and flocking algorithms have been used in quite a few works developed at ICST in Zurich. I have the impression that often this has been done by implementing boids/flocking in OpenFramework, and sending OSC messages to Max, where ambisonic processing is done using the ICST ambisonic externals. You’ll find several publications on the topic here:
https://www.zhdk.ch/index.php?id=icst_publications_main The ICST externals for Max using gain adjustments to emulate distance. When sources are located within the unit circle, the order of the encoding will be modified so that a source located at the very center will be omni only. Although not ambisonic, I would also look towards the work on spatialisation by John Chowning, and how he modifies gain, reverb and dry/wet balance to emulate distance. This is discussed in details e.g. in the book on computer music by Dodge and Jerse. A recent piece by John Chowning was presented in an outdoor setting during ICMS / SMC 2014 in Athens, and I have to say that I was deeply impressed with how he managed to create illusions of sound objects moving in space using only four speakers. Ircam Spat is a third option to check out. Spat can work with ambisonic as well as other spatialisation algorithms, and also emulates air filtering and reverb. Best, Trond > On 12 Apr 2015, at 18:35, Ricky Graham <[email protected]> wrote: > > Hi Dave, > > I guess I’d like to hear how others have mapped the output from boids to > whatever ambisonic panner they’re using. I will have a look for the ICMC > paper. > > While I have your attention, I can use ambilib~ as an example. Would you > simply map the cartesian to polar output to the azimuth (phase) and distance > (amplitude) parameters of your externals? > > I hope you enjoyed the croissants. > > Ricky > >> On Apr 12, 2015, at 12:00 PM, [email protected] wrote: >> >> Message: 4 >> Date: Sun, 12 Apr 2015 09:12:32 +0100 >> From: Dave Malham <[email protected] <mailto:[email protected]>> >> To: Surround Sound discussion group <[email protected] >> <mailto:[email protected]>> >> Subject: Re: [Sursound] Boids for Ambisonic Panning >> Message-ID: >> <CAPw+1zTGodgrsoYtKWhNe=DZVwMy8t1tV=hsw9tpab2umgf...@mail.gmail.com >> <mailto:CAPw+1zTGodgrsoYtKWhNe=DZVwMy8t1tV=hsw9tpab2umgf...@mail.gmail.com>> >> Content-Type: text/plain; charset="utf-8" >> >> Hi Ricky, >> Boids has been around for a long time and I'm certain it's been >> used quite a few times in electroacoustic compositions - in fact, I seem to >> remember one of our students on the Music Technology course here at York >> doing so. Trouble is, I'm darned if I can remember his or her name (which >> will be no surprise to anyone who's been on that course - my apologies to >> the person concerned if they are reading this :-). Your best bet would be >> to look through the Proceedings of the ICMC from around '87 and maybe the >> Computer Music Journal. >> >> I'm not sure what you mean by "...difficult to scale in terms of >> distance". Are you referring to the mapping of the notional distances in >> the boid simulation to the things which we use perceptually to deduce the >> distance of a sound source? That's opening up an interesting can of worms! >> Do a search in the archives for "giant geese" to see the fun we had talking >> (arguing) about it last time. A lot will depend on wether the sound sources >> are "familiar" or not - we can easily tell that a thunder storm (or a jet) is >> distant or nearby because we are familiar with them as "perceptual objects" >> and can construe them within the acoustic space we are listening in but >> with constructed sounds that we are not familiar with we are stuck with >> "immediate" (and to some extent, unreliable) cues like direct to >> reverberant ratios, the pattern of early reflections, HF rolloff and maybe >> distortion (loud sounds have distortion which increases with distance). If >> he's currently on the list, I suspect Peter Lennox will jump in here and >> tell me I've got it all wrong :-). >> >> Anyway, I'm sure much/all of this is old news for you but I had to have >> something to occupy a Sunday morning whilst waiting for the croissants to >> warm up .... >> >> All the best.... >> >> Dave > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20150412/08ac65b7/attachment.html> > _______________________________________________ > Sursound mailing list > [email protected] > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit > account or options, view archives and so on. _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
