Some pyaudio resources

clapper.ipynb

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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "https://stackoverflow.com/questions/46768459/python-recording-and-playing-microphone-input"
   ]
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   "metadata": {},
   "source": [
    "\"\"\"\n",
    "PyAudio Example: Make a wire between input and output (i.e., record a\n",
    "few samples and play them back immediately).\n",
    "\"\"\"\n",
    "\n",
    "import pyaudio\n",
    "\n",
    "CHUNK = 1024\n",
    "WIDTH = 2\n",
    "CHANNELS = 2\n",
    "RATE = 44100\n",
    "RECORD_SECONDS = 5\n",
    "\n",
    "p = pyaudio.PyAudio()\n",
    "\n",
    "stream = p.open(format=p.get_format_from_width(WIDTH),\n",
    "                channels=CHANNELS,\n",
    "                rate=RATE,\n",
    "                input=True,\n",
    "                output=True,\n",
    "                frames_per_buffer=CHUNK)\n",
    "\n",
    "print(\"* recording\")\n",
    "\n",
    "for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):\n",
    "    data = stream.read(CHUNK)  #read audio stream\n",
    "    stream.write(data, CHUNK)  #play back audio stream\n",
    "\n",
    "print(\"* done\")\n",
    "\n",
    "stream.stop_stream()\n",
    "stream.close()\n",
    "\n",
    "p.terminate()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Also: https://gist.github.com/ZWMiller/53232427efc5088007cab6feee7c6e4c"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [],
   "source": [
    "\"\"\"\n",
    "Modified from https://github.com/jpihl/pyclapper/blob/master/clapper.py\n",
    "\n",
    "The MIT License (MIT)\n",
    "Copyright (c) 2016 Jeppe Pihl\n",
    "\"\"\"\n",
    "import time\n",
    "import array\n",
    "import pyaudio\n",
    "import sys\n",
    "\n",
    "CHUNK_SIZE = 512 #1024\n",
    "MIN_VOLUME = 12000\n",
    "\n",
    "def clapper(stop_check, clap_callback):\n",
    "    p = pyaudio.PyAudio()\n",
    "    stream = p.open(\n",
    "        format=pyaudio.paInt16,\n",
    "        channels=2,\n",
    "        rate=44100,\n",
    "        input=True,\n",
    "        frames_per_buffer=1024)\n",
    "    last = 0\n",
    "    while True:\n",
    "        if stop_check():\n",
    "            stream.stop_stream()\n",
    "            stream.close()\n",
    "            p.terminate()\n",
    "            break\n",
    "        chunk = array.array('h', stream.read(CHUNK_SIZE))\n",
    "        volume = max(chunk)\n",
    "        if volume >= MIN_VOLUME:\n",
    "            now = time.time()\n",
    "            diff = now - last\n",
    "            if diff > 0.2: # and diff < 1.0:\n",
    "                clap_callback()\n",
    "            last = now\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [],
   "source": [
    "def stopper():\n",
    "    # return True based on some outside-of-thread condition (like a file)\n",
    "    return False"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "clapper(stopper, lambda : print(\"CLAP\"))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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