Hello Lee,

What you describe is possible to do with the Ambisonic Toolkit:

http://www.ambisonictoolkit.net/wiki/tiki-index.php


With the SC3 implementation you have access to everything within SC3... which 
includes convolution.

http://doc.sccode.org/Guides/Intro-to-the-ATK.html


This ISN'T what I'd do, though... 




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Joseph Anderson

j.ander...@ambisonictoolkit.net
http://www.ambisonictoolkit.net
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



On 24 Feb 2015, at 1:25 pm, Fons Adriaensen <f...@linuxaudio.org> wrote:

> On Tue, Feb 24, 2015 at 03:16:24PM -0500, Lee Byrd wrote:
> 
>> 1) Specify a changing polar response that varies by frequency, morphing
>> smoothly between two specified first-order patterns set at two specific
>> frequencies.
>> 
>> 2) Specify a changing frequency response that varies between two user
>> specified equalization curves: a direct on-axis curve and a 180-degree
>> off-axis curve, so that the frequency response of the virtual microphone
>> varies smoothly by the angle of incidence.
> 
> Neither would be really difficult to do, but I know of no tool that
> does this OOTB.
> 
> For 1) provided your are using Linux, you could use Ambdec in its
> dual frequency band mode, just create a config file that defines
> the two patterns and the crossover frequency.
> 
> For 2) all depends on how you specify the two FR. If you have them
> available as two equalisers, feed those with two back-to-back
> virtual cardioids (which you could create again with ambdec, or
> tetraproc) and sum the outputs.
> 
> Ciao,
> 
> -- 
> FA
> 
> A world of exhaustive, reliable metadata would be an utopia.
> It's also a pipe-dream, founded on self-delusion, nerd hubris
> and hysterically inflated market opportunities. (Cory Doctorow)
> 
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