Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Bo-Erik Sandholm
I would like to make the comment that is this part of the discussion we are well in to the psychoacoustic domain. There are not many, possibly only a very few models of loudspeakers that produces a sound pressure that even have a faint likeness to The electric input signal for example a square

Re: [Sursound] Pitch(OT)

2013-04-26 Thread Richard Dobson
I am not clear just what the issue is here. C and A are defined by the distance between them; A is not a sharp C. All the notes are equally special, there is nothing otherwise special about middle C, and it is in any case only approximately in the middle for the modern concert piano. For most

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Richard Dobson
On 26/04/2013 02:33, Robert Greene wrote: .. No relatively simple physical process produces exactly a correct answer over a small interval and then suddenly does not over a large interval. What is a relatively simple physical process in this context? Optical focus? Tuning of multiple

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Peter Lennox
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[Sursound] EBU workshop on immersive audio over headphones

2013-04-26 Thread Chris Pike
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Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Peter Lennox
I would guess that the criteria for designing a single speaker, or a pair, are actually different than those for designing a wavefront reconstruction system. Ambisonics always had that peculiarity that a room full of quite modest speakers sounded better than they had any right to. It would be

Re: [Sursound] EBU workshop on immersive audio over headphones

2013-04-26 Thread David Pickett
At 05:30 26-04-13, Chris Pike wrote: The programme contains an excellent array of speakers from the broadcasting industry and academia, with panel discussions and many demonstrations. an array of speakers... An ambiguous collective noun in the context! David

Re: [Sursound] Pitch(OT)

2013-04-26 Thread David Pickett
At 04:50 26-04-13, Richard Dobson wrote: I am not clear just what the issue is here. The issue is that if one is going to be precise about the Physics and Maths discussed here, one should preferably extend that precision to musical considerations. ...there is nothing otherwise special

Re: [Sursound] Pitch(OT)

2013-04-26 Thread Richard Dobson
On 26/04/2013 15:35, David Pickett wrote: .. For most other instruments it is not in the middle at all. It is is the lowest note on the standard flute, almost the highest note on the bassoon Have you heard the first note of the Rite of Spring - a C one octave higher? This note is playable

Re: [Sursound] Pitch(OT)

2013-04-26 Thread Paul Hodges
--On 26 April 2013 16:28 +0100 Richard Dobson richarddob...@blueyonder.co.uk wrote: Beethoven 9th asks the choir basses to sing a top D and that I can confirm is decidedly painful at modern concert pitch. At early 19th-C chorton it was hopefully a bit easier. Trained good singers can manage

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Richard Dobson
On 26/04/2013 00:28, Sampo Syreeni wrote: On 2013-04-25, Fons Adriaensen wrote: For first order the 'extrapolation' works well up to a distance of around 1/4 to 1/3 of a wavelength. So, in English, what your subwoofer plays back is usually cut off at 80 or 120Hz. There the wavelength would

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Aaron Heller
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Re: [Sursound] Pitch(OT)

2013-04-26 Thread Paul Hodges
--On 26 April 2013 14:12 -0500 David Pickett d...@fugato.com wrote: Yes, but mostly the bottom note is an A, with only once a G. And when you get to the important fortissimo top Es and Fs, do you leave them to the Tenors? Eh, what do you sing? The tenors have enough on their plates dealing

Re: [Sursound] Pitch(OT)

2013-04-26 Thread Richard Dobson
On 26/04/2013 20:12, David Pickett wrote: At 10:28 26-04-13, Richard Dobson wrote: Beethoven 9th asks the choir basses to sing a top D and that I can confirm is decidedly painful at modern concert pitch. At early 19th-C chorton it was hopefully a bit easier. Trained good singers can manage it,

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Fons Adriaensen
On Thu, Apr 25, 2013 at 06:33:47PM -0700, Robert Greene wrote: To my mind it makes not much sense to suppose that the first order reconstruction is correct in a neighborhood of the listener but higher order is correct in a larger neighborhood--not literally correct. This seems

Re: [Sursound] Pitch(OT)

2013-04-26 Thread David Pickett
At 14:30 26-04-13, Paul Hodges wrote: --On 26 April 2013 14:12 -0500 David Pickett d...@fugato.com wrote: Yes, but mostly the bottom note is an A, with only once a G. And when you get to the important fortissimo top Es and Fs, do you leave them to the Tenors? Eh, what do you sing? I can

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Sampo Syreeni
On 2013-04-26, Fons Adriaensen wrote: (Okay, this one is long and filled with intuition-beyond-verified-math. Take it with a grain of salt, even if I think there's a point or two there..) Nobody claims there's a hard border between the 'correctly reconstructed' area and the rest. If you're

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Robert Greene
OK this part I believe! As I recall the original statement was that in a small area it was correct, and then it was not. That I found incomprehensible. But this makes perfect sense of course. Thanks for the clarification Robert On Fri, 26 Apr 2013, Fons Adriaensen wrote: On Thu, Apr 25, 2013

Re: [Sursound] What does a mic with more than 4 channels give you?

2013-04-26 Thread Sampo Syreeni
On 2013-04-27, Sampo Syreeni wrote: (And actually doesn't even get solved properly unless you impose such a cutoff. In most papers that cutoff is imposed by accident by restricting the analysis to the order of the spherical harmonical decomposition that the system aims at; bit mistake: in the