Just received an email which - seems someone else is reinventing the Soundfield again - see http://www.quaud.io/ This time it's based on mems microphones and is very small so it ends up using blind source separation in order to get good source-interference ratios. There's only one reference to Gerzon and Craven in their papers, the latest one, and it's only brief - and no mention at all of Villa Pulkki's work which seems closely related. Interesting... Dave
Hi Dave, That is interesting... but then, too much info might preclude their getting a patent? I did notice that the mic in question uses omnidirectional capsules. I'll have to re-re-read the literature by Gerzon, Craven, et al. I recall that Gerzon's earliest ideas depended on figure-of-eight mics (akin to Blumlein Stereo), whereas all later incarnations use subcardiod mics. Whether this is of any consequence or not... I don't know. Does beam forming or delay techniques to create additional first-order patterns from the omnidirectional mics change up the design (and math) from arrays using intrinsically cardiod mic elements? Anyway, I certainly hope credit will go to where credit belongs. Long live Ambisonics! Eric C. PS--I look forward to listening to the YouTube samples of from the aforementioned link. I hope it's not another helicopter. Or worse, a barber shop scenario. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130420/1a2206ba/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
