Hey Eric, Yes, please. I’d love to read them, and thanks for the information. I think I will attempt the following:
1 Omni for W pointed upward 2 figure 8 placed across one another for front-back and left-right (X / Y) No need for Z at the moment. Does this sound reasonable? I read an article on B+ format also using an additional stereo pair. Could be useful? Ricky > On Mar 5, 2015, at 5:01 PM, Eric Benjamin <eb...@pacbell.net> wrote: > > Ricky Graham <ri...@rickygraham.net> wrote: > > Does anyone have any experience recording B-Format with multiple microphones > set to specific polar patterns (i.e. if you don’t have access to an ambisonic > / tetramic?). Is it possible? If so, what are some of the issues / problems > with this approach? > ******************************************************************************************************************* > Along with Thomas Chen, I wrote two AES papers on this subject, "The Native > B-format Microphone" parts I and II. The abstracts can be seen here: > http://www.aes.org/e-lib/browse.cfm?elib=13348 > http://www.aes.org/e-lib/browse.cfm?elib=13444 > > The gist of the papers is, as you say, how to record B-format if you don't > have a soundfield microphone. Aside from getting the microphones as close > together as physically possible, it's important to do some post-processing to > make the frequency responses of the various microphones more alike than they > naturally are. Most figure eight condenser microphones roll off in the bass > at about 150 Hz. Most omni microphones make it down to 20 Hz or lower. You > can either boost the bass on the Fig 8s or roll-off the bass on the omnis. We > used two systems. One of them was comprised of lavaliere microphones (or > hearing aid microphones) and the other was two Schoeps Mk8s and an Mk2. > > One idea that we didn't try is that perhaps the omni (W) should be facing > upwards. Omnidirectional microphones, even very good ones like the Schoeps, > are really not very omni. So facing the microphone upwards guarantees that > the response will be the same in every direction in the horizontal plane. The > front-back (X) microphone can be placed above the omni, facing downwards. > That leaves the left-right (Y) microphone to be placed elsewhere. There are > no perfect solutions here! > > If you would like copies of the two papers, just let me know. I haven't > looked at them since we wrote them, but I don't think that we told any lies! > > Eric Benjamin -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20150305/eca025f0/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.
