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     "source": [
      "The goal of this notebook is to generate the altered scales. That is, for the C altered scale, you\n",
      "want to implement a function generate the notes (only for octave 3 and above, since only predicting for\n",
      "melody notes with octave > 3)\n",
      "\n",
      "[C3 D-3 E-3 F-3 (or E?) G-3 A-3 B-3 C4 D-4 E-4 ...]\n",
      "\n",
      "This notebook isn't meant to have input or output for other files -- here you just want to brainstorm the function so you can put it in Predictive Chord Modeling (to better train the classifier). Not for use with N-Gram Pipeline!"
     ]
    },
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     "input": [
      "# Generates the altered scale from octaves 3 to 6 for a pitch (e.g. G-)\n",
      "# for a given note (e.g. G-3) in music21 style.\n",
      "# Returns altered scale as list of music21 notes.\n",
      "def genAltered(note='C3'):\n",
      "    # In case you have to convert a note (e.g. F#) into form below\n",
      "    def convertSharps(note):\n",
      "        pitch = ''.join([i for i in note if i.isdigit() is False])\n",
      "        enharmonic = {\"C#\" : \"D-\", \"D#\" : \"E-\", \"E#\" : \"F\", \"F#\" : \"G-\", \"G#\" : \"A-\", \"A#\" : \"B-\", \"B#\" : \"C\"}\n",
      "        if '#' in pitch: return enharmonic[pitch]\n",
      "        return pitch\n",
      "    \n",
      "    # Get scale with dictionary. For example: allscales[note[:-1]]\n",
      "    allscales = {\n",
      "        \"C\"  : [\"C3\", \"D-3\", \"E-3\", \"E3\", \"G-3\", \"A-3\", \"B-3\", \n",
      "               \"C4\", \"D-4\", \"E-4\", \"E4\", \"G-4\", \"A-4\", \"B-4\", \n",
      "               \"C5\", \"D-5\", \"E-5\", \"E5\", \"G-5\", \"A-5\", \"B-5\", \n",
      "               \"C6\", \"D-6\", \"E-6\", \"E6\", \"G-6\", \"A-6\", \"B-6\"],\n",
      "        \"D-\" : [\"D-3\", \"D3\", \"E3\", \"F3\", \"G3\", \"A3\", \"B3\", \n",
      "               \"D-4\", \"D4\", \"E4\", \"F4\", \"G4\", \"A4\", \"B4\", \n",
      "               \"D-5\", \"D5\", \"E5\", \"F5\", \"G5\", \"A5\", \"B5\", \n",
      "               \"D-6\", \"D6\", \"E6\", \"F6\", \"G6\", \"A6\", \"B6\"],\n",
      "        \"D\"  : [\"D3\", \"E-3\", \"F3\", \"G-3\", \"A-3\", \"B-3\", \"C4\", \"D4\",\n",
      "                \"E-4\", \"F4\", \"G-4\", \"A-4\", \"B-4\", \"C5\", \"D5\",\n",
      "                \"E-5\", \"F5\", \"G-5\", \"A-5\", \"B-5\", \"C6\", \"D6\",\n",
      "                \"E-6\", \"F6\", \"G-6\", \"A-6\", \"B-6\"],\n",
      "        \"E-\" : [\"D-3\",\n",
      "                \"E-3\", \"E3\", \"G-3\", \"G3\", \"A3\", \"B3\", \"D-4\",\n",
      "                \"E-4\", \"E4\", \"G-4\", \"G4\", \"A4\", \"B4\", \"D-5\",\n",
      "                \"E-5\", \"E5\", \"G-5\", \"G5\", \"A5\", \"B5\", \"D-6\",\n",
      "                \"E-6\", \"E6\", \"G-6\", \"G6\", \"A6\", \"B6\"],\n",
      "        \"F\"  : [\"D-3\", \"E-3\",\n",
      "                \"F3\", \"G-3\", \"A-3\", \"A3\", \"B3\", \"D-4\", \"E-4\",\n",
      "                \"F4\", \"G-4\", \"A-4\", \"A4\", \"B4\", \"D-5\", \"E-5\",\n",
      "                \"F5\", \"G-5\", \"A-5\", \"A5\", \"B5\", \"D-6\", \"E-6\",\n",
      "                \"F6\", \"G-6\", \"A-6\", \"A6\", \"B6\"],\n",
      "        \"G-\" : [\"C3\", \"D3\", \"E3\",\n",
      "                \"G-3\", \"G3\", \"A3\", \"B-3\", \"C4\", \"D4\", \"E4\",\n",
      "                \"G-4\", \"G4\", \"A4\", \"B-4\", \"C5\", \"D5\", \"E5\",\n",
      "                \"G-5\", \"G5\", \"A5\", \"B-5\", \"C6\", \"D6\", \"E6\",\n",
      "                \"G-6\", \"G6\", \"A6\", \"B-6\"],\n",
      "        \"G\"  : [\"D-3\", \"E-3\", \"F3\",\n",
      "                \"G3\", \"A-3\", \"B-3\", \"B3\", \"D-4\", \"E-4\", \"F4\",\n",
      "                \"G4\", \"A-4\", \"B-4\", \"B4\", \"D-5\", \"E-5\", \"F5\",\n",
      "                \"G5\", \"A-5\", \"B-5\", \"B5\", \"D-6\", \"E-6\", \"F6\",\n",
      "                \"G6\", \"A-6\", \"B-6\", \"B6\"],\n",
      "        \"A-\" : [\"C3\", \"D3\", \"E3\", \"G-3\",\n",
      "                \"A-3\", \"A3\", \"B3\", \"C4\", \"D4\", \"E4\", \"G-4\",\n",
      "                \"A-4\", \"A4\", \"B4\", \"C5\", \"D5\", \"E5\", \"G-5\",\n",
      "                \"A-5\", \"A5\", \"B5\", \"C6\", \"D6\", \"E6\", \"G-6\",\n",
      "                \"A-6\", \"A6\", \"B6\"],\n",
      "        \"A\"  : [\"C3\", \"D-3\", \"E-3\", \"F3\", \"G3\",\n",
      "                \"A3\", \"B-3\", \"C4\", \"D-4\", \"E-4\", \"F4\", \"G4\",\n",
      "                \"A4\", \"B-4\", \"C5\", \"D-5\", \"E-5\", \"F5\", \"G5\",\n",
      "                \"A5\", \"B-5\", \"C6\", \"D-6\", \"E-6\", \"F6\", \"G6\",\n",
      "                \"A6\", \"B-6\", \"C7\"],\n",
      "        \"B-\" : [\"D-3\", \"D3\", \"E3\", \"G-3\", \"A-3\",\n",
      "                \"B-3\", \"B3\", \"D-4\", \"D4\", \"E4\", \"G-4\", \"A-4\",\n",
      "                \"B-4\", \"B4\", \"D-5\", \"D5\", \"E5\", \"G-5\", \"A-5\",\n",
      "                \"B-5\", \"B5\", \"D-6\", \"D6\", \"E6\", \"G-6\", \"A-6\",\n",
      "                \"B-6\", \"B6\"],\n",
      "        \"B\"  : [\"C3\", \"D3\", \"E-3\", \"F3\", \"G3\", \"A3\",\n",
      "                \"B3\", \"C4\", \"D4\", \"E-4\", \"F4\", \"G4\", \"A4\",\n",
      "                \"B4\", \"C5\", \"D5\", \"E-5\", \"F5\", \"G5\", \"A5\",\n",
      "                \"B5\", \"C6\", \"D6\", \"E-6\", \"F6\", \"G6\", \"A6\",\n",
      "                \"B6\"]}\n",
      "    pitch = ''.join([i for i in note if i.isdigit() is False])\n",
      "    pitch = convertSharps(note) # Rm. octaveinfo, eg. G-5 --> G-, G5->G\n",
      "    return allscales[pitch]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "G-\n"
       ]
      },
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 21,
       "text": [
        "['C3',\n",
        " 'D3',\n",
        " 'E3',\n",
        " 'G-3',\n",
        " 'G3',\n",
        " 'A3',\n",
        " 'B-3',\n",
        " 'C4',\n",
        " 'D4',\n",
        " 'E4',\n",
        " 'G-4',\n",
        " 'G4',\n",
        " 'A4',\n",
        " 'B-4',\n",
        " 'C5',\n",
        " 'D5',\n",
        " 'E5',\n",
        " 'G-5',\n",
        " 'G5',\n",
        " 'A5',\n",
        " 'B-5',\n",
        " 'C6',\n",
        " 'D6',\n",
        " 'E6',\n",
        " 'G-6',\n",
        " 'G6',\n",
        " 'A6',\n",
        " 'B-6']"
       ]
      }
     ],
     "prompt_number": 21
    },
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