Hmmm, thanks for that. I was thinking of doing a software decoder. I've been using Audiomulch and the UHJ impulses up till now, but have been having phase issues with the final audio (which by he way the hardware decoders suffer from as well)
Just thought it would be interesting to do a software version of a hardware decoder I am definitely not the right person to answer to that, but: UHJ decoders with better directional "resolution" used to have four 10-pole phase shifters. The three AD7 shifters are eight pole (if I remember right, would need to check the schematics.) > Also a > question, I thought on only X& Y were phase shifted +90 degrees > during encoding, am I wrong in this thinking? AFAIK it is difficult to design phase shifters with so "low" shifts. It is the relative phase difference between the phase shifters inside the decoder that counts. The W shifter has a certain phase shift and the other shifter outputs are leading or lacking the W in phase. A further difficulty is that the relative phase difference between the component signals should be the same on all frequencies. Again - as far as I have understood, this is difficult to solve in analog phase shifters. As the encoders also were made with analog phase shifters, errors in both of them added up as directional distortion. This is the way a sound designer sees it, other people on the list may be able to give you a more scientific explanation. Eero _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1325 / Virus Database: 1500/3606 - Release Date: 04/30/11 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110430/198313a3/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
