diff --git a/VoiceChangerDemo.ipynb b/VoiceChangerDemo.ipynb
index bae6e7602..5903869e3 100644
--- a/VoiceChangerDemo.ipynb
+++ b/VoiceChangerDemo.ipynb
@@ -6,7 +6,7 @@
       "name": "VoiceChangerDemo",
       "provenance": [],
       "collapsed_sections": [],
-      "authorship_tag": "ABX9TyN+8irLJYUFlwMPzvHMSJof",
+      "authorship_tag": "ABX9TyMGicNQLwe01+RypHQi293k",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -30,6 +30,18 @@
         "<a href=\"https://colab.research.google.com/github/w-okada/voice-changer/blob/dev/VoiceChangerDemo.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
       ]
     },
+    {
+      "cell_type": "code",
+      "source": [
+        "# Voice Changer Demo\n",
+        "このノートはVoice Changer"
+      ],
+      "metadata": {
+        "id": "3oW_LGv-lL_d"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
     {
       "cell_type": "markdown",
       "source": [],
@@ -47,7 +59,7 @@
           "base_uri": "https://localhost:8080/"
         },
         "id": "vV1t7PBRm-o6",
-        "outputId": "60fc80b2-a39e-4840-88c1-0d8d483a36ca"
+        "outputId": "d796c25d-c3f7-4977-cd26-7c724c72e178"
       },
       "execution_count": 1,
       "outputs": [
@@ -55,7 +67,7 @@
           "output_type": "stream",
           "name": "stdout",
           "text": [
-            "Wed Aug 31 06:14:56 2022       \n",
+            "Wed Aug 31 06:26:38 2022       \n",
             "+-----------------------------------------------------------------------------+\n",
             "| NVIDIA-SMI 460.32.03    Driver Version: 460.32.03    CUDA Version: 11.2     |\n",
             "|-------------------------------+----------------------+----------------------+\n",
@@ -64,7 +76,7 @@
             "|                               |                      |               MIG M. |\n",
             "|===============================+======================+======================|\n",
             "|   0  Tesla T4            Off  | 00000000:00:04.0 Off |                    0 |\n",
-            "| N/A   72C    P8    12W /  70W |      0MiB / 15109MiB |      0%      Default |\n",
+            "| N/A   58C    P8    10W /  70W |      0MiB / 15109MiB |      0%      Default |\n",
             "|                               |                      |                  N/A |\n",
             "+-------------------------------+----------------------+----------------------+\n",
             "                                                                               \n",
@@ -93,23 +105,11 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 3,
+      "execution_count": null,
       "metadata": {
-        "colab": {
-          "base_uri": "https://localhost:8080/"
-        },
-        "id": "2wxD-gRSMU5R",
-        "outputId": "83bb80fa-9ced-43e2-a304-d53a3501b142"
+        "id": "2wxD-gRSMU5R"
       },
-      "outputs": [
-        {
-          "output_type": "stream",
-          "name": "stdout",
-          "text": [
-            "Mounted at /content/drive\n"
-          ]
-        }
-      ],
+      "outputs": [],
       "source": [
         "from google.colab import drive\n",
         "drive.mount('/content/drive')"
@@ -128,7 +128,7 @@
         "id": "86wTFmqsNMnD",
         "outputId": "3fc68f14-b6b7-48bb-e285-5bed78e74f26"
       },
-      "execution_count": 4,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -158,7 +158,7 @@
         "id": "CBsogR-zWH4r",
         "outputId": "f4c9737b-831d-4938-d387-caf07693030e"
       },
-      "execution_count": 5,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -184,7 +184,7 @@
         "id": "uCEKf3_JNoyq",
         "outputId": "746e1946-5c3a-49af-df26-d86149f8adb1"
       },
-      "execution_count": 6,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -204,7 +204,7 @@
       "metadata": {
         "id": "Bn4kV8TgXp8i"
       },
-      "execution_count": 11,
+      "execution_count": null,
       "outputs": []
     },
     {
@@ -219,7 +219,7 @@
         "id": "pjxPsOOaXXTj",
         "outputId": "1bf85102-87ed-462c-e732-cffb878d95f3"
       },
-      "execution_count": 12,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -299,7 +299,7 @@
         "id": "LwZAAuqxX7yY",
         "outputId": "c67b2741-7a1e-448d-abf9-7b8d8f5e3d15"
       },
-      "execution_count": 13,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -474,7 +474,7 @@
       "metadata": {
         "id": "iNOAB7zISI6J"
       },
-      "execution_count": 14,
+      "execution_count": null,
       "outputs": []
     },
     {
@@ -489,7 +489,7 @@
         "id": "chu06KpAjEK6",
         "outputId": "887c2d50-c49f-4a22-f0d0-8a3667511466"
       },
-      "execution_count": 18,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -516,7 +516,7 @@
         },
         "outputId": "abf57f92-5cb6-4325-b64a-095d42f561d5"
       },
-      "execution_count": 27,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "display_data",
@@ -556,7 +556,7 @@
         },
         "outputId": "b5635a1e-6ac6-41db-a706-dc3e5fb866a5"
       },
-      "execution_count": 23,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",