Hi Wilson, First of all you have to understand the upmixing algorithms themselves before starting implementing them. Some methods that can do that are Directional Audio Coding (DirAC), which you can read all about in the “Parametric Time-frequency Domain Spatial Audio” book of last year, and numerous articles from AES journal and conferences. Then there is the HARPEX method by Svein Berge for FOA signals, you can find the articles online. Another option is the recent COMPASS method which can also upmix second-order or 3rd-order if needed. Finally, an alternative is the sparse recovery approach by Wabnitz, Jin and Epain, published mostly in IEEE conferences.
There are two plugins I know of offering this functionality at the moment, one by Blue Ripple Sound that uses HARPEX, and one based on COMPASS by us, which is to be released this month. In general if you have no previous experience with the various parts of these methods, time-frequency transforms, parameter estimation, adaptive filtering, maybe decorrelation, and others.. expect to spend many months testing things till you manage to get good audio quality. Best regards, Archontis Politis On 22 Feb 2019, at 03:37, Wilx Wilson <wilxson....@gmail.com<mailto:wilxson....@gmail.com>> wrote: Hi Everyone, Not sure if I have missed a discussion about upmixing with ambisonics on Sursound. Just wondering if anyone is willing to share some information on how to implement upmixing algorithms from 1st Order Ambisonics A&B-format to 3rd Order Ambisonics B-format. I am really curious to know on how they are implemented mathematically. Because I am developing a prototype plugin for my research project. Have a good day! Much Obliged, Wilson Lim -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20190222/c16a21c1/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu<mailto:Sursound@music.vt.edu> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20190222/782f0c2f/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.
