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 microphome (captured using Aliki, see below) 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. 

Future versions of TetraCal will also exploit the convolution matrix implemented in TetraProc.

TetraProc is a development by Fons Adriaensen
Homepage: http://kokkinizita.linuxaudio.org

Compiled and packed for Mac OS X by Matthias Kronlachner in Nov-2012.
http://www.matthiaskronlachner.com