pretty_midi.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "from pypianoroll import Multitrack, Track\n",
    "import pretty_midi\n",
    "import numpy as np\n",
    "# For plotting\n",
    "#import mir_eval.display\n",
    "import librosa.display\n",
    "import matplotlib.pyplot as plt\n",
    "%matplotlib inline\n",
    "# For putting audio in the notebook\n",
    "import IPython.display"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "file = '/home/eurismar/Downloads/midi/f0a2e027de2728e15411649fc8ca2cf6.mid'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# We'll load in the example.mid file distributed with pretty_midi\n",
    "pm = pretty_midi.PrettyMIDI(file)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "image/png": 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Us7PUToMjIiQdAVyefBa/CFgOnJVU2Rd4TNJmwKsFzQcA90jqCzQA/wtcS2lz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\n",
      "text/plain": [
       "<matplotlib.figure.Figure at 0x7fe90942b2b0>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "def plot_piano_roll(pm, start_pitch, end_pitch, fs=100):\n",
    "    # Use librosa's specshow function for displaying the piano roll\n",
    "    librosa.display.specshow(pm.get_piano_roll(fs)[start_pitch:end_pitch],\n",
    "                             hop_length=1, sr=fs, x_axis='time', y_axis='cqt_note',\n",
    "                             fmin=pretty_midi.note_number_to_hz(start_pitch))\n",
    "\n",
    "plt.figure(figsize=(8, 4))\n",
    "plot_piano_roll(pm, 56, 70)\n",
    "# Note the blurry section between 1.5s and 2.3s - that's the pitch bending up!"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.3"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}