diff --git a/source/snes9x/apu/apu.cpp b/source/snes9x/apu/apu.cpp
index 87ce82a..0d1e8a4 100644
--- a/source/snes9x/apu/apu.cpp
+++ b/source/snes9x/apu/apu.cpp
@@ -4,7 +4,6 @@
    For further information, consult the LICENSE file in the root directory.
 \*****************************************************************************/
 
-
 #include <math.h>
 #include "../snes9x.h"
 #include "apu.h"
diff --git a/source/snes9x/apu/apu.h b/source/snes9x/apu/apu.h
index 91722d1..07d233a 100644
--- a/source/snes9x/apu/apu.h
+++ b/source/snes9x/apu/apu.h
@@ -4,7 +4,6 @@
    For further information, consult the LICENSE file in the root directory.
 \*****************************************************************************/
 
-
 #ifndef _APU_H_
 #define _APU_H_
 
diff --git a/source/snes9x/apu/hermite_resampler.h b/source/snes9x/apu/hermite_resampler.h
index 899223e..a0a8ec8 100644
--- a/source/snes9x/apu/hermite_resampler.h
+++ b/source/snes9x/apu/hermite_resampler.h
@@ -1,4 +1,8 @@
-/* Simple resampler based on bsnes's ruby audio library */
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
 
 #ifndef __HERMITE_RESAMPLER_H
 #define __HERMITE_RESAMPLER_H
diff --git a/source/snes9x/apu/resampler.h b/source/snes9x/apu/resampler.h
index 4f8cf6f..d1125ba 100644
--- a/source/snes9x/apu/resampler.h
+++ b/source/snes9x/apu/resampler.h
@@ -1,4 +1,8 @@
-/* Simple resampler based on bsnes's ruby audio library */
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
 
 #ifndef __RESAMPLER_H
 #define __RESAMPLER_H
diff --git a/source/snes9x/apu/ring_buffer.h b/source/snes9x/apu/ring_buffer.h
index eb8cbda..fb9cf58 100644
--- a/source/snes9x/apu/ring_buffer.h
+++ b/source/snes9x/apu/ring_buffer.h
@@ -1,4 +1,8 @@
-/* Simple byte-based ring buffer. Licensed under public domain (C) BearOso. */
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
 
 #ifndef __RING_BUFFER_H
 #define __RING_BUFFER_H