added tiltmusic demo

chozabu · chozabu · commit a20fbe82c919 · 2016-09-19T17:26:49.000+01:00
diff --git a/examples/tiltmusic.py b/examples/tiltmusic.py
@@ -0,0 +1,54 @@
+# TiltMusic by Alex "Chozabu" P-B. September 2016.
+#
+# Tilt Y to change Pitch
+# press A to turn sound on or off
+# hold B and tilt X to change the note length
+#
+# A quick demo can be found at https://youtu.be/vvECQTDiWxQ
+#
+# This program has been placed into the public domain.
+
+from microbit import *
+import music
+
+#A selection of sharp notes
+notes = [233.08, 277.18, 311.13, 369.99, 415.30,
+466.16, 554.37, 622.25, 739.99, 830.61, 932.33,
+1108.73, 1244.51, 1479.98, 1661.22, 1864.66,
+2217.46, 2489.02, 2959.96, 3322.44, 3729.31,
+4434.92, 4978.03, 5919.91, 6644.88, 7458.62]
+
+#note lengths
+note_durations = [
+ 50, 100, 200, 400, 800
+]
+durationlen = len(note_durations)
+notelen = len(notes)
+
+duration = 100
+
+play_music = True
+
+while True:
+    #get accelerometer readings
+    xreading = abs(accelerometer.get_x())
+    yreading = abs(accelerometer.get_y())
+    
+    #use a to toggle music
+    if button_a.was_pressed():
+        play_music = not play_music
+    if not play_music:
+        continue
+    
+    #get a note based on tilt
+    note = xreading*.01
+    pitch = notes[int(note)%notelen]
+    
+    #if b is pressed, alter the length based on tilt
+    if button_b.is_pressed() == 1:
+        #pitch *= .5
+        duration = note_durations[int(yreading*0.01)%durationlen]
+    
+    #play our sound!
+    music.pitch(int(pitch), duration)
+        
