add a wav file writer example

Author: driscollis

wav_writer.py

@@ -0,0 +1,21 @@
+import random
+import struct
+import wave
+
+
+sample_rate = 44100.0  # hertz
+duration = 1.0  # seconds
+frequency = 440.0  # hertz
+
+wav = wave.open("sample.wav", "w")
+wav.setnchannels(1) # mono
+wav.setsampwidth(2)
+wav.setframerate(sample_rate)
+
+# Create a wav file _ hissy noise
+for i in range(2000):
+    value = random.randint(-32767, 32767)
+    data = struct.pack('<h', value)
+    wav.writeframesraw(data)
+
+wav.close()