diff --git a/tests/tester.cc b/tests/tester.cc
index 168f249..4ab6ecf 100644
--- a/tests/tester.cc
+++ b/tests/tester.cc
@@ -926,3 +926,108 @@ TEST_CASE("zero-sized-bin-chunk-glb", "[issue-440]") {
 
   REQUIRE(true == ret);
 }
+
+TEST_CASE("serialize-node-emitter", "[KHR_audio]") {
+  // Stream to serialize to
+  std::stringstream os;
+
+  {
+    tinygltf::Model m;
+    // Create a default audio emitter
+    m.audioEmitters.resize(1);
+    // Create a single node
+    m.nodes.resize(1);
+    // The node references the single emitter
+    m.nodes[0].emitter = 0;
+    // Create a single scene
+    m.scenes.resize(1);
+    // Make the scene reference the single node
+    m.scenes[0].nodes.push_back(0);
+
+    // Serialize model to output stream
+    tinygltf::TinyGLTF ctx;
+    bool ret = ctx.WriteGltfSceneToStream(&m, os, false, false);
+    REQUIRE(true == ret);
+  }
+
+  {
+    tinygltf::Model m;
+    tinygltf::TinyGLTF ctx;
+    // Parse the serialized model
+    bool ok = ctx.LoadASCIIFromString(&m, nullptr, nullptr, os.str().c_str(), os.str().size(), "");
+    REQUIRE(true == ok);
+
+    // Make sure the single scene is there
+    REQUIRE(1 == m.scenes.size());
+    // Make sure all three nodes are there
+    REQUIRE(1 == m.nodes.size());
+    // Make sure the single root node of the scene is there
+    REQUIRE(1 == m.scenes[0].nodes.size());
+    REQUIRE(0 == m.scenes[0].nodes[0]);
+    // Retrieve the scene root node
+    const tinygltf::Node& node = m.nodes[m.scenes[0].nodes[0]];
+    // Make sure the single root node has both lod nodes
+    REQUIRE(0 == node.emitter);
+  }
+}
+
+TEST_CASE("serialize-lods", "[lods]") {
+  // Stream to serialize to
+  std::stringstream os;
+
+  {
+    tinygltf::Model m;
+
+    m.nodes.resize(3);
+    // Add Node 1 and Node 2 as lods to Node 0
+    m.nodes[0].lods.push_back(1);
+    m.nodes[0].lods.push_back(2);
+
+    // Add Material 1 and Material 2 as lods to Material 0
+    m.materials.resize(3);
+    m.materials[0].lods.push_back(1);
+    m.materials[0].lods.push_back(2);
+
+    tinygltf::Scene scene;
+    // Scene uses Node 0 as root node
+    scene.nodes.push_back(0);
+    // Add scene to the model
+    m.scenes.push_back(scene);
+
+    // Serialize model to output stream
+    tinygltf::TinyGLTF ctx;
+    bool ret = ctx.WriteGltfSceneToStream(&m, os, false, false);
+    REQUIRE(true == ret);
+  }
+
+  {
+    tinygltf::Model m;
+    tinygltf::TinyGLTF ctx;
+    // Parse the serialized model
+    bool ok = ctx.LoadASCIIFromString(&m, nullptr, nullptr, os.str().c_str(), os.str().size(), "");
+    REQUIRE(true == ok);
+
+    // Make sure all three materials are there
+    REQUIRE(3 == m.materials.size());
+    // Make sure the first material has both lod materials
+    REQUIRE(2 == m.materials[0].lods.size());
+    // Make sure the order is still the same after serialization and deserialization
+    CHECK(1 == m.materials[0].lods[0]);
+    CHECK(2 == m.materials[0].lods[1]);
+
+    // Make sure the single scene is there
+    REQUIRE(1 == m.scenes.size());
+    // Make sure all three nodes are there
+    REQUIRE(3 == m.nodes.size());
+    // Make sure the single root node of the scene is there
+    REQUIRE(1 == m.scenes[0].nodes.size());
+    REQUIRE(0 == m.scenes[0].nodes[0]);
+    // Retrieve the scene root node
+    const tinygltf::Node& node = m.nodes[m.scenes[0].nodes[0]];
+    // Make sure the single root node has both lod nodes
+    REQUIRE(2 == node.lods.size());
+    // Make sure the order is still the same after serialization and deserialization
+    CHECK(1 == node.lods[0]);
+    CHECK(2 == node.lods[1]);
+  }
+}
diff --git a/tiny_gltf.h b/tiny_gltf.h
index 7c7227c..7ef28f4 100644
--- a/tiny_gltf.h
+++ b/tiny_gltf.h
@@ -764,6 +764,7 @@ struct Material {
   std::string alphaMode{"OPAQUE"}; // default "OPAQUE"
   double alphaCutoff{0.5};        // default 0.5
   bool doubleSided{false};        // default false
+  std::vector<int> lods;          // level of detail materials (MSFT_lod)
 
   PbrMetallicRoughness pbrMetallicRoughness;
 
@@ -1018,6 +1019,7 @@ class Node {
   int mesh{-1};
   int light{-1};    // light source index (KHR_lights_punctual)
   int emitter{-1};  // audio emitter index (KHR_audio)
+  std::vector<int> lods; // level of detail nodes (MSFT_lod)
   std::vector<int> children;
   std::vector<double> rotation;     // length must be 0 or 4
   std::vector<double> scale;        // length must be 0 or 3
@@ -5165,6 +5167,24 @@ static bool ParseNode(Node *node, std::string *err, const detail::json &o,
   }
   node->emitter = emitter;
 
+  node->lods.clear();
+  if (node->extensions.count("MSFT_lod") != 0) {
+    auto const &msft_lod_ext = node->extensions["MSFT_lod"];
+    if (msft_lod_ext.Has("ids")) {
+      auto idsArr = msft_lod_ext.Get("ids");
+      for (size_t i = 0; i < idsArr.ArrayLen(); ++i) {
+        node->lods.emplace_back(idsArr.Get(i).GetNumberAsInt());
+      }
+    } else {
+      if (err) {
+        *err +=
+            "Node has extension MSFT_lod, but does not reference "
+            "other nodes via their ids.\n";
+      }
+      return false;
+    }
+  }
+
   return true;
 }
 
@@ -5364,6 +5384,24 @@ static bool ParseMaterial(Material *material, std::string *err, std::string *war
   ParseExtrasAndExtensions(material, err, o,
                            store_original_json_for_extras_and_extensions);
 
+  material->lods.clear();
+  if (material->extensions.count("MSFT_lod") != 0) {
+    auto const &msft_lod_ext = material->extensions["MSFT_lod"];
+    if (msft_lod_ext.Has("ids")) {
+      auto idsArr = msft_lod_ext.Get("ids");
+      for (size_t i = 0; i < idsArr.ArrayLen(); ++i) {
+        material->lods.emplace_back(idsArr.Get(i).GetNumberAsInt());
+      }
+    } else {
+      if (err) {
+        *err +=
+            "Material has extension MSFT_lod, but does not reference "
+            "other materials via their ids.\n";
+      }
+      return false;
+    }
+  }
+
   return true;
 }
 
@@ -7579,11 +7617,40 @@ static void SerializeGltfMaterial(const Material &material, detail::json &o) {
   }
 
   SerializeParameterMap(material.additionalValues, o);
-#else
-
 #endif
 
   SerializeExtrasAndExtensions(material, o);
+
+  // MSFT_lod
+  if (!material.lods.empty()) {
+    detail::json_iterator it;
+    if (!detail::FindMember(o, "extensions", it)) {
+      detail::json extensions;
+      detail::JsonSetObject(extensions);
+      detail::JsonAddMember(o, "extensions", std::move(extensions));
+      detail::FindMember(o, "extensions", it);
+    }
+    auto &extensions = detail::GetValue(it);
+    if (!detail::FindMember(extensions, "MSFT_lod", it)) {
+      detail::json lod;
+      detail::JsonSetObject(lod);
+      detail::JsonAddMember(extensions, "MSFT_lod", std::move(lod));
+      detail::FindMember(extensions, "MSFT_lod", it);
+    }
+    SerializeNumberArrayProperty<int>("ids", material.lods, detail::GetValue(it));
+  } else {
+    detail::json_iterator ext_it;
+    if (detail::FindMember(o, "extensions", ext_it)) {
+      auto &extensions = detail::GetValue(ext_it);
+      detail::json_iterator lp_it;
+      if (detail::FindMember(extensions, "MSFT_lod", lp_it)) {
+        detail::Erase(extensions, lp_it);
+      }
+      if (detail::IsEmpty(extensions)) {
+        detail::Erase(o, ext_it);
+      }
+    }
+  }
 }
 
 static void SerializeGltfMesh(const Mesh &mesh, detail::json &o) {
@@ -7806,7 +7873,7 @@ static void SerializeGltfNode(const Node &node, detail::json &o) {
       detail::json audio;
       detail::JsonSetObject(audio);
       detail::JsonAddMember(extensions, "KHR_audio", std::move(audio));
-      detail::FindMember(o, "KHR_audio", it);
+      detail::FindMember(extensions, "KHR_audio", it);
     }
     SerializeNumberProperty("emitter", node.emitter, detail::GetValue(it));
   } else {
@@ -7823,6 +7890,37 @@ static void SerializeGltfNode(const Node &node, detail::json &o) {
     }
   }
 
+  // MSFT_lod
+  if (!node.lods.empty()) {
+    detail::json_iterator it;
+    if (!detail::FindMember(o, "extensions", it)) {
+      detail::json extensions;
+      detail::JsonSetObject(extensions);
+      detail::JsonAddMember(o, "extensions", std::move(extensions));
+      detail::FindMember(o, "extensions", it);
+    }
+    auto &extensions = detail::GetValue(it);
+    if (!detail::FindMember(extensions, "MSFT_lod", it)) {
+      detail::json lod;
+      detail::JsonSetObject(lod);
+      detail::JsonAddMember(extensions, "MSFT_lod", std::move(lod));
+      detail::FindMember(extensions, "MSFT_lod", it);
+    }
+    SerializeNumberArrayProperty<int>("ids", node.lods, detail::GetValue(it));
+  } else {
+    detail::json_iterator ext_it;
+    if (detail::FindMember(o, "extensions", ext_it)) {
+      auto &extensions = detail::GetValue(ext_it);
+      detail::json_iterator lp_it;
+      if (detail::FindMember(extensions, "MSFT_lod", lp_it)) {
+        detail::Erase(extensions, lp_it);
+      }
+      if (detail::IsEmpty(extensions)) {
+        detail::Erase(o, ext_it);
+      }
+    }
+  }
+
   if (!node.name.empty()) SerializeStringProperty("name", node.name, o);
   SerializeNumberArrayProperty<int>("children", node.children, o);
 }