Joy of Music

music.ipynb

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   "cell_type": "markdown",
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   "metadata": {},
   "source": [
    "# Joy of Music"
   ]
  },
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   "cell_type": "markdown",
   "id": "d51813db-d58d-49ee-b60f-dd77c133378e",
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   "source": [
    "An experiment to explore python programming through carnatic sangeetam."
   ]
  },
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   "cell_type": "code",
   "execution_count": 1,
   "id": "3659c397-2009-42ba-b521-4f6020146a04",
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   "outputs": [
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     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Overwriting music.py\n"
     ]
    }
   ],
   "source": [
    "%%file music.py\n",
    "\"\"\"Joy of music!\n",
    "\n",
    "Joy of music is small python library to play musical notes in a jupyter notebook.\n",
    "\"\"\"\n",
    "from IPython.display import DisplayHandle, Javascript\n",
    "from time import sleep\n",
    "\n",
    "_display = DisplayHandle(\"music\")\n",
    "\n",
    "lib = Javascript(\"https://unpkg.com/[email protected]/build/Tone.js\")\n",
    "_display.display(lib)\n",
    "print(\"loaded tone.js library\")\n",
    "\n",
    "def play(note):\n",
    "    js = Javascript(f\"\"\"\n",
    "        const synth = new Tone.Synth().toDestination();\n",
    "        synth.triggerAttackRelease(\"{note}\", \"8n\");\n",
    "    \"\"\")\n",
    "    _display.update(js)\n"
   ]
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   "source": [
    "## Uncomment this if you want to reload the module\n",
    "\n",
    "# import sys\n",
    "# sys.modules.pop(\"music\", None)"
   ]
  },
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   "execution_count": 3,
   "id": "035aadcf-9d90-455a-95e7-761acdd71fe0",
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    {
     "data": {
      "application/javascript": [
       "\n",
       "        const synth = new Tone.Synth().toDestination();\n",
       "        synth.triggerAttackRelease(\"C4\", \"8n\");\n",
       "    "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "loaded tone.js library\n"
     ]
    }
   ],
   "source": [
    "from music import play, sleep"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "06c94dc6-7a6d-4ec2-8798-889838e5fb50",
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   "source": [
    "notes = {\n",
    "    \"s\": \"C4\",\n",
    "    \"r\": \"D4\",\n",
    "    \"g\": \"E4\",\n",
    "    \"m\": \"F4\",\n",
    "    \"p\": \"G4\",\n",
    "    \"d\": \"A4\",\n",
    "    \"n\": \"B4\",\n",
    "    \"S\": \"C5\"\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "b1c26057-51ee-4069-a01f-6b26eb229518",
   "metadata": {},
   "outputs": [],
   "source": [
    "def play_swara(swara):\n",
    "    \"\"\"Play a swara of carnatic music.\n",
    "    \"\"\"\n",
    "    note = notes[swara]\n",
    "    play(note)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "37eb8768-d44a-4d12-adce-1ef1be28a5fc",
   "metadata": {},
   "outputs": [],
   "source": [
    "play_swara(\"s\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "97611045-3c20-4a3d-978c-31898e5d9df0",
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   "outputs": [],
   "source": [
    "def play_swaras(swaras):\n",
    "    \"\"\"Play a list of swaras\"\"\"\n",
    "    for swara in swaras:\n",
    "        play_swara(swara)\n",
    "        sleep(0.5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "66196f34-163a-49dd-847d-c98e4298019e",
   "metadata": {},
   "outputs": [],
   "source": [
    "play_swaras(\"srgrs\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "5963d023-9880-45c0-adc6-eab29b7f0d56",
   "metadata": {
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   "source": [
    "Let's define some ragas."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "5d0fd30b-1d2c-46ed-bce4-0b42d2334e5b",
   "metadata": {},
   "outputs": [],
   "source": [
    "ragas = {\n",
    "    \"kalyani\": \"srgmpdnS\",\n",
    "    \"mohanam\": \"srgpdS\"\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "10a4ac62-3e17-4ab8-9154-e3f7f7f19b14",
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   "source": [
    "def aarohanam(raga):\n",
    "    swaras = ragas[raga]\n",
    "    play_swaras(swaras)\n",
    "\n",
    "def avarohanam(raga):\n",
    "    swaras = ragas[raga]\n",
    "    play_swaras(reversed(swaras))\n",
    "    \n",
    "def janta_varusalu(raga):\n",
    "    swaras = ragas[raga]\n",
    "    janta_swaras = []\n",
    "    for s in swaras:\n",
    "        janta_swaras.append(s)\n",
    "        janta_swaras.append(s)\n",
    "    play_swaras(janta_swaras)\n",
    "    play_swaras(janta_swaras[::-1])\n",
    "\n",
    "def play_raga(raga):\n",
    "    aarohanam(raga)\n",
    "    avarohanam(raga)\n",
    "    janta_varusalu(raga)"
   ]
  },
  {
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   "outputs": [],
   "source": [
    "play_raga(\"kalyani\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "d4df543b-703a-4bc9-a210-349500b0ab18",
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   "source": [
    "def flatten(nested_values):\n",
    "    result = []\n",
    "    for values in nested_values:\n",
    "        for v in values:\n",
    "            result.append(v)\n",
    "    return result\n",
    "        \n",
    "def triplets(swaras):\n",
    "    return flatten(zip(swaras, swaras[1:], swaras[2:]))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "a7edc9de-91d4-4f31-ac29-f2ecce4fce28",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['s', 'r', 'g', 'r', 'g', 'm']"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "triplets(\"srgm\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "e88e1a91-30b4-4a56-9dca-1f252bd3f7d4",
   "metadata": {},
   "outputs": [],
   "source": [
    "swaras = triplets(ragas[\"kalyani\"]) \n",
    "play_swaras(swaras + swaras[::-1])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "96903794-05ff-49c6-8ed5-61df7077a05a",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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