Added comments, frequency variable

CircuitPython_Essentials/CircuitPython_Audio_Out_Tone.py

@@ -9,7 +9,8 @@ button = digitalio.DigitalInOut(board.A1)
 button.switch_to_input(pull=digitalio.Pull.UP)
 
 tone_volume = 0.1  # Increase this to increase the volume of the tone.
-length = 8000 // 440
+frequency = 440  # Set this to the Hz of the tone you want to generate.
+length = 8000 // frequency
 sine_wave = array.array("H", [0] * length)
 for i in range(length):
     sine_wave[i] = int((1 + math.sin(math.pi * 2 * i / 18)) * tone_volume * (2 ** 15))

CircuitPython_Essentials/CircuitPython_Audio_Out_Wave.py

@@ -12,9 +12,12 @@ audio = audioio.AudioOut(board.A0)
 
 while True:
     audio.play(wave)
+
+    # This allows you to do other things while the audio plays!
     t = time.monotonic()
     while time.monotonic() - t < 6:
         pass
+
     audio.pause()
     print("Waiting for button press to continue!")
     while button.value: