Try using IPython.display.display instead of returning IPython.displa…

…y.Audio in ipywidgets.interact in examples/pitch_manipulation.ipynb, as workaround for deadline

docs/examples/pitch_manipulation.ipynb

@@ -226,30 +226,18 @@
    "source": [
     "import ipywidgets\n",
     "import glob\n",
+    "from IPython.display import Audio\n",
+    "\n",
     "\n",
     "def interactive_change_pitch(audio_file, factor):\n",
     "    sound = parselmouth.Sound(audio_file)\n",
     "    sound_changed_pitch = change_pitch(sound, factor)\n",
-    "    return Audio(data=sound_changed_pitch.values, rate=sound_changed_pitch.sampling_frequency)\n",
+    "    display(Audio(data=sound_changed_pitch.values, rate=sound_changed_pitch.sampling_frequency))\n",
     "\n",
     "w = ipywidgets.interact(interactive_change_pitch,\n",
     "                        audio_file=ipywidgets.Dropdown(options=sorted(glob.glob(\"audio/*.wav\")), value=\"audio/4_b.wav\"),\n",
     "                        factor=ipywidgets.FloatSlider(min=0.25, max=4, step=0.05, value=1.5))"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {
-    "nbsphinx": "hidden",
-    "tags": []
-   },
-   "outputs": [],
-   "source": [
-    "# Workaround deadlock with ipywidgets.interact and IPython.display.Audio (https://github.com/jupyter/nbconvert/issues/2029)\n",
-    "import time\n",
-    "time.sleep(2)"
-   ]
   }
  ],
  "metadata": {