Merge pull request #2 from yuma-m/feature/fix-player

Fix Player class

Author: yuma-m

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.4
+
+- Fix channels of Player class from 2 to 1 to play proper sound.
+
 ## 0.1.3
 
 - Specify audio output device.

setup.py

@@ -1,5 +1,5 @@
 from setuptools import setup, find_packages
-version = '0.1.3'
+version = '0.1.4'
 
 try:
     import pypandoc

synthesizer/player.py

@@ -1,21 +1,20 @@
 # -*- coding: utf-8 -*-
 
-import struct
-
 import numpy as np
 
 
 class Player(object):
 
-    def __init__(self, channels=2, rate=44100):
+    def __init__(self, rate=44100):
         try:
             import pyaudio
             self._pyaudio = pyaudio.PyAudio()
             self._format = pyaudio.paInt16
         except ImportError:
             self._pyaudio = None
         self._stream = None
-        self._channels = channels
+        # TODO: support stereo channels
+        self._channels = 1
         self._rate = rate
 
     def enumerate_device(self):
@@ -65,6 +64,5 @@ def play_wave(self, wave):
         """
         if not self._stream:
             raise RuntimeError("audio stream is not opened, please call open_stream() first.")
-        wave = (wave * float(2 ** 15 - 1)).astype(np.int16).tolist()
-        data = struct.pack("h" * len(wave), *wave)
-        self._stream.write(data)
+        wave = (wave * float(2 ** 15 - 1)).astype(np.int16).tobytes()
+        self._stream.write(wave)