Update README.md

README.md

@@ -33,14 +33,19 @@ If you have a problem at compile time it may be due to a bad configuration of yo
 
 **Optional modules**
 
-    #f_gnuplot
-    #Draw as gnuplot graph, the values of blc_channels
+    #f_gnuplot : Draw as gnuplot graph, the values of blc_channels
     brew install gnuplot --with-qt
     git submodule add  git submodule add https://framagit.org/blaar/f_gnuplot.git
+    
+    #f_fftw : Apply fft on the signal. Need fftw
+    brew install fftw
+    git submodule add https://framagit.org/blaar/f_fftw.git
+    
+    #i_load_sound : load any kind of sound file. Required libsndfile
+    brew install libsndfile
+    git submodule add https://framagit.org/blaar/i_load_sound.git
  
- 
-    #f_view_channel
-    #gtk interface to view blc_channels (need gtk3, blgtk basic library for gtk3,  will be installed)
+    #f_view_channel : gtk interface to view blc_channels (need gtk3, blgtk basic library for gtk3,  will be installed)
     brew install gtk+3 gnome-icon-theme
     git submodule add https://framagit.org/blaar/blgtk.git
     git submodule add https://framagit.org/blaar/f_view_channel.git