Move 'synth' module

smnp/module/synth/lib/player.py

@@ -0,0 +1,24 @@
+import time
+
+from smnp.module.synth.lib.wave import sine
+from smnp.note.model import Note
+
+
+def playNotes(notes, bpm):
+    for note in notes:
+        {
+            Note: play,
+            int: pause
+        }[type(note)](note, bpm)
+
+
+def play(note, bpm):
+    frequency = note.toFrequency()
+    duration = 60 * 4 / note.duration / bpm
+    duration *= 1.5 if note.dot else 1
+    sine(frequency, duration)
+
+
+def pause(value, bpm):
+    time.sleep(60 * 4 / value / bpm)
+

smnp/module/synth/lib/wave.py

@@ -0,0 +1,12 @@
+import time
+
+import numpy as np
+import sounddevice as sd
+
+FS = 44100
+
+
+def sine(frequency, duration):
+    samples = (np.sin(2*np.pi*np.arange(FS*duration)*frequency/FS)).astype(np.float32)
+    sd.play(samples, FS)
+    time.sleep(duration)