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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