Re: [Sursound] Of stereo miking, Fourier analysis, and Ambisonics

2013-06-30 Thread Robert Greene
This is for sure! The legendary Mercuries(three spaced omnis and nothing else) and their ilk are completely unconvincing to anyone who listens to them impartially-- there is no there there. But the whole nation of the USA has ignored this obvious fact for ..well pretty much forever. Once on th

Re: [Sursound] Of stereo miking, Fourier analysis, and Ambisonics

2013-06-30 Thread Fons Adriaensen
On Sat, Jun 29, 2013 at 06:13:19PM -0700, Robert Greene wrote: > I do not understand the last bit of this message below at all. > There is no such thing as a signal that is limited > in bandwidth and in time--not if limited > means actually 0 outside a finite interval > in both cases. This is a b

Re: [Sursound] Of stereo miking, Fourier analysis, and Ambisonics

2013-06-29 Thread Robert Greene
I do not understand the last bit of this message below at all. There is no such thing as a signal that is limited in bandwidth and in time--not if limited means actually 0 outside a finite interval in both cases. This is a basic result of Fourier analysis. This kind of signal does not exist, not

Re: [Sursound] Of stereo miking, Fourier analysis, and Ambisonics

2013-06-28 Thread Eric Carmichel
Re: Of stereo miking, Fourier analysis, and Ambisonics ***excerpt from previous post: ...Instead of the required condition for the latter - the signal being limited in bandwidth - the condition for the discrete spectrum being a complete (i.e. invertible) description of the signal is that the si

Re: [Sursound] Of stereo miking, Fourier analysis, and Ambisonics

2013-06-28 Thread David Pickett
At 06:34 28/6/2013, Eric Carmichel wrote: >The technique assumes that the live source is *stereo* too; that is, a >stage ahead of the mics with musicians aligned in rows that have L-R >orientations. Actually, if you think about it, the Blumlein technique assumes that the musicians are arranged

Re: [Sursound] Of stereo miking, Fourier analysis, and Ambisonics

2013-06-28 Thread Fons Adriaensen
On Thu, Jun 27, 2013 at 04:33:46PM -0700, Eric Carmichel wrote: > I have to agree with Joern that the example miking demonstration > isn’t all that fair, and for another reason: How much low-frequency > energy can a 2-inch speaker provide? I don't know what kind of signal was used for this test,

Re: [Sursound] Of stereo miking, Fourier analysis, and Ambisonics

2013-06-27 Thread Eric Carmichel
Hello Jeff, I wasn't criticizing the preferred miking technique; just saying the demo itself had inherent limitations. One of my favorite mic techniques is the Blumlein arrangement, but this isn't terribly  popular in the US. The disadvantage of the Blumlein is that sound sources from the rear o