Index: dev_comm/excitation.txt
===================================================================
--- dev_comm/excitation.txt	(nonexistent)
+++ dev_comm/excitation.txt	(revision 23467)
@@ -0,0 +1,16 @@
+
+There are 5 kinds of excitation but for a first release lets only do Gaussian
+excitation.
+
+It has 2 inputs we care about. They are frequencies the manual calls f0 and
+fc.
+
+f0 is the center frequency
+fc is the 20db cutoff frequency
+
+technically there is another variable but lets assume we aren't trying to
+support every mode of operation and just assume users who need it will have to
+do some programming of their own.
+
+
+