Le 29 févr. 2012 à 23:51, Miguel Negrao a écrit : > >> Accuracy is required if the production and reproduction environments >> are independent. If they are not there's a lot of headroom. > > Yes, my intended use is for real-time encode and decode on the spot. All the > spatial information is stored parametrically, i.e. mono sounds + x,y,z > coordinates. Also, forgot to say, the rig is 3D with 34 speakers, 26 above > ground and 8 below ground forming a kind of sphere, but it’s not really > symmetrical to the center listening position (it’s the sonic lab of SARC). > > best, > Miguel >
I played with Ircam Spat in the SARC's Sonic Lab last week. The slight asymmetry is no big deal for artistic purposes. I used energy-preserving decoding (F. Zotter, H. Pomberger, and M. Noisternig, “Energy-Preserving Ambisonic Decoding,” Acta Acust United Ac, vol. 98, no. 1, pp. 37–47, Jan. 2012) but any decoder would probably do the job (the speaker layout is not too badly conditioned). The following aspects seemed to me more important than any insanely complex decoder optimizations : - the four rings have different speakers models and you absolutely have to equalize them (at least per ring but preferably individually) - the basement speakers are in an extremely reverberant cavity (concrete walls, no acoustic treatments) so expect nothing but blurriness for virtual sources in the lower hemisphere (- you obviously need to time-align the speakers) -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20120301/4b94b39f/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
