diff --git a/doc/notes.txt b/doc/notes.txt
index 408eed4..050b713 100644
--- a/doc/notes.txt
+++ b/doc/notes.txt
@@ -730,7 +730,63 @@ Sequence Editor Design
        Enable/Disable selected events.
         
      
-    
+=============================================================================
+
+                                  
+                                      
+                             a                   b
+    piano --> mic ----> adc --> fbctl --> xform -+-> dac --> spkr --> room --+
+     ^         ^                  ^              |                           |
+     |         |                  |              |                           |
+     |         |                  +--------------+                           |
+     +---------+-------------------------------------------------------------+
+
+fbctl Design:
+
+      
+
+1. Measure the spectrum of the room impulse response.
+   a. Generate a sine sweep, or Max. length sequance, s,  with a non-symetric envelope.
+               
+   b. Playback s and record the result N times
+      using different mic. positions.
+      
+   c. S = STFT(s)
+      R = sum(STFT(r_i) / N
+      
+   d. Align S and R using PHAT.
+   e. RIR = mean(S - R)
+
+
+2. Find the delay, d, which minimizes sum(a-b)
+
+       a ----------> DFT() --\
+                              - --->  
+       b --> z^d --> DFT() --/
+       
+
+=============================================================================
+
+  1. Use spectral flux to generate an impulse signal: f.
+  2. f' = 1-f correlates to the level of time dependency in the signal.
+     Frames with a high time dependency contain more reberberated signal.
+  3. Setup a 2xT NMF problem  Y = HE
+  4. Initialize spectrum 1 as the f weighted avg. of all spectra.
+  5. Initialize spectrum 2 as the f' weighted avg. of all spectra.
+  6. Initialize env. 1 as f
+  7. Initialize env. 2 as f'
+  8. Allow all other variables, other than f', to vary - spectrum 2
+     is the impulse response.  
+
+   alternatively use gradient descent, or alternating LS, rather than NMF
+
+
+=============================================================================
+
+New vector library:
+1. Use type generic pre-proc feature.
+2. Explicit matrix representation.
+3. Use BLAS and LAPACK.
 
 
 =============================================================================
@@ -748,13 +804,13 @@ OSX - Install Notes
 6. sudo port install fftw-3-single
 7. port select --list gcc (which gcc is active)
 8. sudo port install gcc47
-9. sudo port --set gcc mp-gcc47
+9. sudo port --set gcc mp-gcc47 (6/15/15 the default, mp-gcc5, works without this stp)
    sudo port intsall gdb  (then edit /System/Library/LaunchDaemons/com.apple.taskgated.plist <string>s<string> to <string>sp<string>.
 10. sudo port install fltk
 11. sudo port install xorg-libX11 
 12.sudo port install git
 13.sudo port install emacs +x11
-14 install ~/Library/Preferences/org.larke.kc.txt (is this required?)
+14 install ~/Library/Preferences/org.larke.kc.txt (this is not required)
 15 create ~/Library/Preferences/kc
 16 Install ~/Library/Preferences/time_line.js, time_line_preset.js, time_line_preset.csv