or yes, take a first order B-Format IR and upsample using Harpex is another possibility.
J On 23 April 2018 at 12:24, jack reynolds <jackreynolds...@gmail.com> wrote: > The new coresound octomic is based on two tetramics, with one rotated 45 > degrees from the other, so if you could work out how the second order > B-format is extracted from the octomic array, you could potentially take an > A-format reponse with your tetramic, rotate the mic 45 degrees and capture > another, then process all eight channels? > Just a thought. > > Jack > > On 23 April 2018 at 11:51, Bo-Erik Sandholm <bosses...@gmail.com> wrote: > >> Have never used Max, I need just 2, but probably 4 sound source positions >> and one listening position. >> But the listening position should have full spherical ambisonic >> soundfield. >> But the result should be ambisonic IR's for these 4 sources. >> >> The question is could upsampling be used ? >> >> BR Bo-Erik >> >> >> >> 2018-04-23 10:47 GMT+02:00 Hyunkook Lee <h....@hud.ac.uk>: >> >> > Indeed HIRT is the best IR capture package for Max. There is also >> HAART, >> > which is a standalone Max application we developed using HIRT. This >> > software is all in one box for multichannel IR capture (24 mics x 24 >> > sources), acoustic parameter analysis and binauralisation. The analysis >> > part is still under development, but the IR capture and binauralisation >> > parts are fully working. You can download it here >> > >> > http://eprints.hud.ac.uk/id/eprint/24579/ >> > >> > Also as Pierre mentioned, we captured over 2000 IRs of 39 multichannel >> mic >> > array configurations from stereo to 9ch 3D using HAART. The library >> comes >> > with a Max renderer where you can convolve dry sources or signals fed >> from >> > DAW with the mic array IRs for simultaneous comparisons between >> techniques. >> > >> > https://github.com/APL-Huddersfield/MAIR-Library-and-Renderer >> > >> > Best, >> > Hyunkook >> > ========================================= >> > Dr Hyunkook Lee, BMus(Tonmeister), PhD, MAES, FHEA >> > Senior Lecturer in Music Technology >> > Leader of the Applied Psychoacoustics Laboratory (APL) >> > http://www.hud.ac.uk/apl >> > http://www.hyunkooklee.com >> > Phone: +44 (0)1484 471893 >> > Email: h....@hud.ac.uk >> > Office: CE 2 /14a >> > School of Computing and Engineering >> > University of Huddersfield >> > Huddersfield >> > HD1 3DH >> > United Kingdom >> > >> > ________________________________________ >> > From: Sursound [sursound-boun...@music.vt.edu] on behalf of Pierre >> > Alexandre Tremblay [tremb...@gmail.com] >> > Sent: 23 April 2018 09:29 >> > To: Surround Sound discussion group >> > Subject: Re: [Sursound] RIR measuring, how to capture a higher order >> > Ambisonic room responce? >> > >> > If you use Max, try the very versatile HIRT. >> > >> > 2nd order with a tetramic is not possible as far as I am aware through… >> we >> > have done (mega)multimic IRs (24 channels of inputs, of which a 1st >> order >> > ambisonic) of 3 different spaces with our kit, and it was fun and >> > productive to train the ear on difference of multichannel mic techniques >> > (Hyunkook Lee has a cool setup and papers on them, and I was mostly >> > interested in DPA LCR omni vs coincident vs MS) >> > >> > We did many stage positions too. I can investigate if I can share the >> > files if that interests anyone. >> > >> > p >> > >> > >> > > On 23 Apr 2018, at 08:37, Bo-Erik Sandholm <bosses...@gmail.com> >> wrote: >> > > >> > > I want to measure the RIR of a medium size good listening room at >> least >> > up >> > > to second order Ambisonic RIR. >> > > >> > > The IR result is to incorporate the responce and reflections of the >> > > speakers and their positions. >> > > >> > > I have a tetramic. >> > > >> > > Can several measurements and rotation of the tetra mic between them be >> > > combined to create the measurements that comes closer to a second >> order >> > mic? >> > > >> > > I know the basics of using Audacity, and a audio sweep and creating a >> IR >> > > from this. >> > > >> > > >> > > >> > > Bo-Erik Sandholm >> > > Stockholm >> > > -------------- next part -------------- >> > > An HTML attachment was scrubbed... >> > > URL: <https://mail.music.vt.edu/mailman/private/sursound/ >> > attachments/20180423/ee496094/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. >> > University of Huddersfield inspiring tomorrow's professionals. >> > [http://marketing.hud.ac.uk/_HOSTED/EmailSig2014/EmailSigFooter.jpg] >> > >> > This transmission is confidential and may be legally privileged. 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