diff --git a/shared-bindings/audiobusio/I2SOut.c b/shared-bindings/audiobusio/I2SOut.c
index d965aac89e..fd71a6e852 100644
--- a/shared-bindings/audiobusio/I2SOut.c
+++ b/shared-bindings/audiobusio/I2SOut.c
@@ -61,7 +61,7 @@
 //|           length = 8000 // 440
 //|           sine_wave = array.array("H", [0] * length)
 //|           for i in range(length):
-//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / 18) * (2 ** 15) + 2 ** 15)
+//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 15) + 2 ** 15)
 //|
 //|           sine_wave = audiocore.RawSample(sine_wave, sample_rate=8000)
 //|           i2s = audiobusio.I2SOut(board.D1, board.D0, board.D9)
diff --git a/shared-bindings/audiocore/RawSample.c b/shared-bindings/audiocore/RawSample.c
index c0f9325e67..2eadf1fab4 100644
--- a/shared-bindings/audiocore/RawSample.c
+++ b/shared-bindings/audiocore/RawSample.c
@@ -61,7 +61,7 @@
 //|           length = 8000 // 440
 //|           sine_wave = array.array("h", [0] * length)
 //|           for i in range(length):
-//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / 18) * (2 ** 15))
+//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 15))
 //|
 //|           dac = audioio.AudioOut(board.SPEAKER)
 //|           sine_wave = audiocore.RawSample(sine_wave)
diff --git a/shared-bindings/audioio/AudioOut.c b/shared-bindings/audioio/AudioOut.c
index 5748682020..9ba72bd41d 100644
--- a/shared-bindings/audioio/AudioOut.c
+++ b/shared-bindings/audioio/AudioOut.c
@@ -61,7 +61,7 @@
 //|           length = 8000 // 440
 //|           sine_wave = array.array("H", [0] * length)
 //|           for i in range(length):
-//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / 18) * (2 ** 15) + 2 ** 15)
+//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 15) + 2 ** 15)
 //|
 //|           dac = audioio.AudioOut(board.SPEAKER)
 //|           sine_wave = audiocore.RawSample(sine_wave, sample_rate=8000)
diff --git a/shared-bindings/audiopwmio/PWMAudioOut.c b/shared-bindings/audiopwmio/PWMAudioOut.c
index d6b102317f..812b7330d4 100644
--- a/shared-bindings/audiopwmio/PWMAudioOut.c
+++ b/shared-bindings/audiopwmio/PWMAudioOut.c
@@ -63,7 +63,7 @@
 //|           length = 8000 // 440
 //|           sine_wave = array.array("H", [0] * length)
 //|           for i in range(length):
-//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / 18) * (2 ** 15) + 2 ** 15)
+//|               sine_wave[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 15) + 2 ** 15)
 //|
 //|           dac = audiopwmio.PWMAudioOut(board.SPEAKER)
 //|           sine_wave = audiocore.RawSample(sine_wave, sample_rate=8000)