Hi Peter, I have heard 7th-order real-time decoding with headtracking, and that’s from a real microphone array. There was no perceptible latency.
And I think the AmbiX plugins can handle the rotations and (N+1)^2 short convolutions for the same order without problem (head-tracking performance though inside a DAW can be laggy I guess..). "Achieved so far” depends I guess, if you want to capture the full high-frequency variability of HRTFs, you need about 15th order HOA signals. We cannot record that high with any practical microphone array. But if 7th-order decoding has a very small imperceptible difference compared to 15th, or if parametric decoders can achieve the same result with the first few orders for 95% of the sound scenes, then we don’t need to go that much. There is some literature that shows the maximum required order for HRTFs (from a physical perspective), and the effect of the order on the perceptual perspective. On the other hand, for mixing of synthetic scenes a recent PC can probably handle the encoding to 256 HOA channels for 15th order, the matrix multiplications for rotations and the 256 short convolutions, using most of the computer’s resources, but I don’t believe that’s a smart way to go. Best regards, Archontis > On 06 Jun 2016, at 11:49, Peter Lennox <p.len...@derby.ac.uk> wrote: > > That reminds me - what's the highest order ambisonic-to-binaural encoding > achieved so far, in combination with head-tracking (and with what latency)? - > anyone know? > Cheers > ppl > > Dr. Peter Lennox > Senior Lecturer in Perception > College of Arts > University of Derby, UK > e: p.len...@derby.ac.uk > t: 01332 593155 > https://derby.academia.edu/peterlennox > https://www.researchgate.net/profile/Peter_Lennox _______________________________________________ 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.
