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    "# Infinite impulse response filters\n",
    "\n",
    "\n",
    "## [Slides](https://realtimedsp.net/lectures/_static/IIR.pptx)\n",
    "\n",
    "## [Video: voice synthesis from 1939](https://www.youtube.com/watch?v=TsdOej_nC1M)\n",
    "\n",
    "## [chromagram MATLAB example](https://realtimedsp.net/lectures/_static/chromagram.mlx) ([pdf](https://realtimedsp.net/lectures/_static/chromagram.pdf) , [piano.wav](https://realtimedsp.net/lectures/_static/piano.wav) )\n"
   ]
  }
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