diff --git a/attic/test_using_square_wave_octave_approach_stipple.c b/attic/test_using_square_wave_octave_approach_stipple.c
index 777f613..469c4c0 100644
--- a/attic/test_using_square_wave_octave_approach_stipple.c
+++ b/attic/test_using_square_wave_octave_approach_stipple.c
@@ -52,7 +52,7 @@ int lasty = 1000;
 
 int main()
 {
-	#define FSPS  22100
+	#define FSPS  22100  // Careful, this matters!  It is selected to avoid periodic peaks encountered with DC offsets.
 	#define OCTAVES 6
 	#define BPERO 24
 	#define BASE_FREQ 22.5