Hello Dave, I really appreciate your commitment to the discussion. I have almost finished patching the delay fx using G. Wakefield soundfield rotation abstraction.
I have to admit that I am planning to use "in phase" decoder weights as I will be dealing with a large audience even if I use 3rd order. So at this point I am thinking if this can be done for the delay. I have read both Daniel thesis and Wakefield paper and I agree it is confusing. If anyone knows more about wakefield weights, an answer will be much apreciated, I will try to send him an email and see if he answers thank you for discussing about the problem. Sero On Sat, Jun 9, 2012 at 5:00 PM, <[email protected]> wrote: > > > Message: 3 > Date: Sat, 9 Jun 2012 09:05:30 +0100 > From: Dave Malham <[email protected]> > Subject: Re: [Sursound] B- Format to A-format conversion for an > ambisonics fx (SERO SERO) > To: Surround Sound discussion group <[email protected]> > Message-ID: > <capw+1zqxbz_hzhtfsjecqr9euaopuwrj_yshe8wmc_qdvvh...@mail.gmail.com > > > Content-Type: text/plain; charset=UTF-8 > > Graham states in his 2006 ICMC paper > (http://www.mat.ucsb.edu/~wakefield/pubs/06_Wakefield_ICMC_HOAMax.pdf) > that > > "Beneficially, both the ICST externals and those described in this > paper can be used together within the same application." > > However, he also states > > "Several different encoding conventions exist to scale Ambisonic > signals at various orders. The original B-Format definition specified > a scalar of ?2 for the W channel, while the Furse-Malham set (Malham > 1999) scales second-order signals to achieve normalized values in the > Ambisonic domain, and Daniel (2000) specified up to third order > without normalizing weights except for the original ?2 W channel. In > the presented Max/MSP externals the author opted to employ the same > convention as presented by Daniel (2000)" > > which is a little confusing since firstly the weighting of the W > channel is actually 1/?2 and secondly Jerome Daniel states in his > thesis that he prefers SN3D weighting and in table 3.3 on page 156 of > the thesis he shows this as a necessary conversion factor from SN3D to > FuMa (which is the same as original B format for W, X,Y and Z). It > would be good if someone who has actually used the two together could > confirm that they are indeed fully interoperable. Even if they aren't > fully compatible out of the box, it should be easy to make them so as > it is likely it's just a matter of channel weightings and writing a > small subpatch to do the conversions should be easy. > > Dave > > > > > _______________________________________________ > Sursound mailing list > [email protected] > https://mail.music.vt.edu/mailman/listinfo/sursound > > > End of Sursound Digest, Vol 47, Issue 8 > *************************************** > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20120610/c363a080/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
