diff --git a/AudioAlignLR_F32.cpp b/AudioAlignLR_F32.cpp
index 7a2e5cf..2c07fd0 100644
--- a/AudioAlignLR_F32.cpp
+++ b/AudioAlignLR_F32.cpp
@@ -1,6 +1,6 @@
 
 /*------------------------------------------------------------------------------------
-   AudioAlignLR_F32.cpp
+   AudioAlignLR_F32.cpp                             3-21-2022
 
    Author:    Bob Larkin  W7PUA
    Date:      28 Feb 2022
diff --git a/AudioAlignLR_F32.h b/AudioAlignLR_F32.h
index 0b0c9f5..8a0453f 100644
--- a/AudioAlignLR_F32.h
+++ b/AudioAlignLR_F32.h
@@ -1,5 +1,5 @@
 /* ------------------------------------------------------------------------------------
-   AudioAlignLR_F32.h
+   AudioAlignLR_F32.h                                 21 Mar 2022
 
    Function:  Waits for CODEC startup and measures L-R time alignment errors.
    Automatically corrects delay errors.  Requires extra control to disable
@@ -77,6 +77,7 @@
 
  * where the 45 microseconds needs to be adjusted for the sample rate of the Codec
  */
+ // Rev 21 Mar 2022 Added BP Filters on two inputs, pass fs/4.
 
 #ifndef audio_align_lr_f32_h_
 #define audio_align_lr_f32_h_