diff --git a/joycontrol/report.py b/joycontrol/report.py
index 849ac68..7b0e8e6 100644
--- a/joycontrol/report.py
+++ b/joycontrol/report.py
@@ -272,16 +272,29 @@ class OutputReport:
 
     @staticmethod
     def _encode_rumble_data(freq, amp):
-        if not 0 <= freq <= 1252:
-            raise ValueError('Frequency must be in [0, 1252].')
+        # TODO: Fix LA Byte 2
+
+        if not (40 <= freq <= 1253):
+            raise ValueError('Frequency must be in [40, 1253].')
+
+        if amp > 1.003:
+            raise ValueError('Amplitudes higher than 1.003 are not safe '
+                             'for the integrity of the linear resonant actuators')
 
         # Float frequency to hex conversion
         encoded_hex_freq = int(round(math.log2(freq / 10) * 32))
 
         # Convert to Joy-Con HF range. Range in big-endian: 0x0004-0x01FC with +0x0004 steps.
-        hf = (encoded_hex_freq - 0x60) * 4
+        if freq <= 80:
+            hf = 0x00
+        else:
+            hf = (encoded_hex_freq - 0x60) * 4
+
         # Convert to Joy-Con LF range. Range: 0x01-0x7F.
-        lf = encoded_hex_freq - 0x40
+        if freq >= 640:
+            lf = 0x00
+        else:
+            lf = encoded_hex_freq - 0x40
 
         # Float amplitude to hex conversion
         encoded_hex_amp = 0
diff --git a/scripts/joycon_rumble.py b/scripts/joycon_rumble.py
index 0abdae1..81937b3 100644
--- a/scripts/joycon_rumble.py
+++ b/scripts/joycon_rumble.py
@@ -50,21 +50,22 @@ async def send_vibration_report(hid_device):
     await hid_device.write(bytes(data))
     await asyncio.sleep(0.1)
 
+    octave = [261.63, 293.66, 329.63, 349.23, 392.00, 440.00, 493.88, 523.25]
+    octave = [int(round(n)) for n in octave]
+
     time = 2
     while True:
-        for i in range(10):
-            rumble_report = OutputReport()
-            report.set_timer(time)
-            time += 1
-            rumble_report.set_output_report_id(OutputReportID.RUMBLE_ONLY)
-            # increase frequency
-            rumble_report.set_right_rumble_data(100 + i * 100, 1)
-            data = bytes(rumble_report)[1:]
-            print('writing', data)
-            await hid_device.write(bytes(data))
+        rumble_report = OutputReport()
+        report.set_timer(time)
+        time += 1
+        rumble_report.set_output_report_id(OutputReportID.RUMBLE_ONLY)
+        # increase frequency
+        rumble_report.set_right_rumble_data(octave[time % len(octave)], 1)
+        data = bytes(rumble_report)[1:]
+        print('writing', data)
+        await hid_device.write(bytes(data))
 
-            await asyncio.sleep(.5)
-        break
+        await asyncio.sleep(.2)
 
     try:
         await reader
@@ -89,6 +90,11 @@ if __name__ == '__main__':
     if not os.geteuid() == 0:
         raise PermissionError('Script must be run as root!')
 
+    # h = lambda bla: list(map(hex, bla))
+    # report = OutputReport()
+    # report.set_left_rumble_data(1253, 0.012)
+    # exit()
+
     # setup logging
     log.configure()