Conversion and Calibration Software

From Ambisonia

Jump to: navigation, search

Contents

[edit] A- to B-Format conversion technique described by Angelo Farina

A good explanation on how to convert an A-Format recording (four independent channels of a tetrahedron microphone) into a B-Format file is described by Angelo Farina here.

[edit] A- to B-Format conversion software for Linux and OS X by Fons Adriaensen

Tetraproc, which is here

[edit] Install nuances on OS X

  1. Install Jack OS X from http://www.jackosx.com/.
  2. From http://www.kokkinizita.net/linuxaudio/downloads/index.html download "libclthreads" and "libclxclient". Sometimes safari renames .tar.bz2 files to .tar in which case you should first rename them back to .tar.bz2 if you run into problems unarchiving.
    1. unarchive both files.
    2. Open terminal, and go into the one of the directories*1. Type "make" and exectute*2. Type "sudo make install", exectute and enter password.
    3. Repeat procedure for the other folder.
  3. Download fftw-3.2.tar.gz from http://www.fftw.org/download.html.
    1. unarchive and go into the"fftw-3.2" folder directory in the terminal.
    2. Type "./configure --enable-float" and execute. Type "make" and execute. Type "sudo make install", execute and enter password.
  4. Download libsndfile-1.0.17.tar.gz from http://www.mega-nerd.com/libsndfile/.
    1. Go into the "libsndfile-1.0.17" directory in terminal.
    2. Type "./configure" and exectute. Type "make" and execute.Type "sudo make install", execute and enter password.
  5. Go into the "source" directory inside the tetraproc folder.
    1. type "make" and execute. Type "sudo make install", execute and enter password.
  6. In order to see hidden files in the finder execute in the terminal "defaults write com.apple.Finder AppleShowAllFiles YES". Restart the finder by executing in the terminal "killall Finder".
    1. Go to the "HOME" folder in the tetraproc directory and copy .tetraproc and .tetraprocrc to your home folder (/users/your_login/ or ~/).
  7. As the instructions state, you will need to edit the file ~/.tetraprocrc. You need to change two lines. Change "/home/your-login/" to "/Users/zzzzzz/", where zzzzzz is your actual login name (on each of the two lines).
  8. Revert the finder to normal by executing "defaults write com.apple.Finder AppleShowAllFiles NO", followed by "killall Finder".

You can now open tetraproc by typing "tetraproc" in the terminal. To route audio to the tetraproc use the JackPilot routing interface, for example from Ardour to tetraproc.


-*1 type cd and drop the folder into the terminal window.
-*2 hit the return key to execute

[edit] Calibrating a Native B-Format microphone

An approach to calibrating the elements of a native B-Format microphone is described in detail here.

Retrieved from "http://www.ambisonia.com/wiki/index.php/Conversion_and_Calibration_Software"
Personal tools