Thank you all for your replies. I can see now that my questions was not expressed at all well and somewhat sparsely, so thanks for the efforts made to respond, they have been very helpful.
Originally I was intrigued that in discussions on Ambisonics, Mid-Side doesn't seem to feature much even though B-format is idealised 3-way Mid-Side (1 x Omni and 3 x figure-8 virtual coincident microphones). Three aspects occurred - perhaps creating B-format (including limited dimension B-format) directly with actual Mid-Side based recordings would simplify/improve the B-format generation process - no A to B format encoding. As Sampo's reply pointed out though, the issues of deviation of real microphones from the ideal required and lack of complete actual coincidence still remain as ever. Another aspect was the use of B-format based tools to create virtual mics from Mid-Side based recording, even in the one-dimensional case, but particularly for horizontal surround. I think there is some utility in this angle. Justin you mention the ease of creating 5.1 from mid-side - can you point at tools and resources for this please? I would be most interested (I've looked for this kind of tool but without much success). Thirdly, the possibility of interchanging between different virtual microphone configurations, in particular creating non-coincident recordings (e.g. ORTF) from coincident-based originals. This is outside the actual B-format realm as I understand it, but a B-format based tool like Harpex has this kind of capability added to it, which on the demo app sound very good to me. I think the potential is very good in this area. Does anyone know if this is based on the Blumlein Shuffle deign of converting level differences to phase differences for a particular frequency range? Has anyone heard of a tool that can do this "shuffle", or be adapted to do so? Thanks again for your help. Ray E. -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- I have a question on the decoding MS recordings, for instance just 2 channel, by using an ambisonic decoder to create the stereo. Am I off the track here? Would an elaborate MS to ambisonic converter be required, or maybe just a level change between M and S? My purpose is to be able use say Harpex to to do the extra magic it does with converting to different microphone configurations etc, and the possibilities with double MS. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130512/d61549de/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
