====== TetraProc / TetraCal ======
{{metacard>}}

TetraProc converts the A-format signals from a tetrahedral Ambisonic microphone into B-format signals ready for recording. Main features:

  * A-B conversion using a classic scalar matrix and minimum phase filters, or
  * A-B conversion using a 4 by 4 convolution matrix using measured or computed impulse responses, or a combination of both.
  * Individual microphone calibration facilities.
  * 24 dB/oct higpass filters.
  * Metering, monitoring and test facilities.
  * Virtual stereo mic for stereo monitoring or recording.
  * Unlimited number of stored configurations.
  * Jack client with graphical user interface.

TetraCal is the microphone calibration application for TetraProc. Given a number of impulse response measurements of a tetrahedral microphone (captured using [[Aliki]]) it computes the matching configuration file for TetraProc. Main features:

  * Automatic determination of gain and directivity errors of the A-format microphones.
  * Automatic computation of an A-B matrix compensating for those errors.
  * Frequency and phase response display of all A and B format signals.
  * Interactive adjustment of pre- and post matrix equalisers. 

{{tag>JACK ambisonics}}

~~META:title=tetraproc~~
~~META:desc=converts the A-format signals from a tetrahedral Ambisonic microphone into B-format signals ready for recording~~
~~META:logo=~~
~~META:link=http://kokkinizita.linuxaudio.org/linuxaudio/~~
~~META:screenshot=http://kokkinizita.linuxaudio.org/linuxaudio/pict/tetra1.png~~
~~META:banner=~~
~~META:author=Fons Adriaensen~~
~~META:download=http://kokkinizita.linuxaudio.org/linuxaudio/downloads/~~
~~META:version=0.8.2~~
~~META:releasedate=2011-02-28~~   !- preferred date format: YYYY-MM-DD -!