diff --git a/reverse_goertzel.py b/reverse_goertzel.py
index 43f5def..929ba84 100644
--- a/reverse_goertzel.py
+++ b/reverse_goertzel.py
@@ -8,8 +8,8 @@ def goertzel_sinusoid(freq, duration, sample_rate, amplitude):
     coeff = 2.0 * math.cos(omega)
     
     # Initialize state variables
-    q1 = 1.0
-    q2 = 1.0
+    q1 = 1.0 # previous sample in sinusoid (1.0 for sample 1)
+    q2 = 1.0 # previous previous sample (approximately 1.0 for sample 1)
     result = []
     
     for i in range(n):