diff --git a/pype/hosts/harmony/__init__.py b/pype/hosts/harmony/__init__.py
index a6a3310374..fbf5ca6f12 100644
--- a/pype/hosts/harmony/__init__.py
+++ b/pype/hosts/harmony/__init__.py
@@ -1,6 +1,5 @@
 import os
 import sys
-from uuid import uuid4
 
 from avalon import api, io, harmony
 from avalon.vendor import Qt
@@ -10,11 +9,10 @@ from pype import lib
 from pype.api import config
 
 
-signature = str(uuid4())
-
-
 def set_scene_settings(settings):
-    func = """function %s_func(args)
+
+    signature = harmony.signature("set_scene_settings")
+    func = """function %s(args)
     {
         if (args[0]["fps"])
         {
@@ -41,7 +39,7 @@ def set_scene_settings(settings):
             )
         }
     }
-    %s_func
+    %s
     """ % (signature, signature)
     harmony.send({"function": func, "args": [settings]})
 
@@ -62,9 +60,12 @@ def get_asset_settings():
         "resolutionHeight": resolution_height
     }
 
-    harmony_config = config.get_presets().["harmony"]["general"]
+    try:
+        skip_resolution_check = \
+            config.get_presets()["harmony"]["general"]["skip_resolution_check"]
+    except KeyError:
+        skip_resolution_check = []
 
-    skip_resolution_check = harmony_config.get(["skip_resolution_check"], [])
     if os.getenv('AVALON_TASK') in skip_resolution_check:
         scene_data.pop("resolutionWidth")
         scene_data.pop("resolutionHeight")
@@ -84,21 +85,20 @@ def ensure_scene_settings():
             valid_settings[key] = value
 
     # Warn about missing attributes.
-    print("Starting new QApplication..")
-    app = Qt.QtWidgets.QApplication(sys.argv)
-
-    message_box = Qt.QtWidgets.QMessageBox()
-    message_box.setIcon(Qt.QtWidgets.QMessageBox.Warning)
-    msg = "Missing attributes:"
     if invalid_settings:
+        print("Starting new QApplication..")
+        app = Qt.QtWidgets.QApplication.instance()
+        if not app:
+            app = Qt.QtWidgets.QApplication(sys.argv)
+
+        message_box = Qt.QtWidgets.QMessageBox()
+        message_box.setIcon(Qt.QtWidgets.QMessageBox.Warning)
+        msg = "Missing attributes:"
         for item in invalid_settings:
             msg += f"\n{item}"
         message_box.setText(msg)
         message_box.exec_()
 
-    # Garbage collect QApplication.
-    del app
-
     set_scene_settings(valid_settings)
 
 
@@ -121,15 +121,17 @@ def check_inventory():
             outdated_containers.append(container)
 
     # Colour nodes.
-    func = """function %s_func(args){
+    sig = harmony.signature("set_color")
+    func = """function %s(args){
+
         for( var i =0; i <= args[0].length - 1; ++i)
         {
             var red_color = new ColorRGBA(255, 0, 0, 255);
             node.setColor(args[0][i], red_color);
         }
     }
-    %s_func
-    """ % (signature, signature)
+    %s
+    """ % (sig, sig)
     outdated_nodes = []
     for container in outdated_containers:
         if container["loader"] == "ImageSequenceLoader":
@@ -158,7 +160,9 @@ def application_launch():
 
 
 def export_template(backdrops, nodes, filepath):
-    func = """function %s_func(args)
+
+    sig = harmony.signature("set_color")
+    func = """function %s(args)
     {
 
         var temp_node = node.add("Top", "temp_note", "NOTE", 0, 0, 0);
@@ -193,8 +197,8 @@ def export_template(backdrops, nodes, filepath):
         Action.perform("onActionUpToParent()", "Node View");
         node.deleteNode(template_group, true, true);
     }
-    %s_func
-    """ % (signature, signature)
+    %s
+    """ % (sig, sig)
     harmony.send({
         "function": func,
         "args": [
@@ -235,12 +239,14 @@ def install():
 
 def on_pyblish_instance_toggled(instance, old_value, new_value):
     """Toggle node enabling on instance toggles."""
-    func = """function %s_func(args)
+
+    sig = harmony.signature("enable_node")
+    func = """function %s(args)
     {
         node.setEnable(args[0], args[1])
     }
-    %s_func
-    """ % (signature, signature)
+    %s
+    """ % (sig, sig)
     try:
         harmony.send(
             {"function": func, "args": [instance[0], new_value]}
diff --git a/pype/plugins/harmony/create/create_render.py b/pype/plugins/harmony/create/create_render.py
index 493c585a09..a94e395241 100644
--- a/pype/plugins/harmony/create/create_render.py
+++ b/pype/plugins/harmony/create/create_render.py
@@ -13,13 +13,14 @@ class CreateRender(harmony.Creator):
         super(CreateRender, self).__init__(*args, **kwargs)
 
     def setup_node(self, node):
-        func = """function func(args)
+        sig = harmony.signature()
+        func = """function %s(args)
         {
             node.setTextAttr(args[0], "DRAWING_TYPE", 1, "PNG4");
             node.setTextAttr(args[0], "DRAWING_NAME", 1, args[1]);
             node.setTextAttr(args[0], "MOVIE_PATH", 1, args[1]);
         }
-        func
-        """
+        %s
+        """ % (sig, sig)
         path = "{0}/{0}".format(node.split("/")[-1])
         harmony.send({"function": func, "args": [node, path]})
diff --git a/pype/plugins/harmony/load/load_audio.py b/pype/plugins/harmony/load/load_audio.py
index 600791e61a..71ce5b30e0 100644
--- a/pype/plugins/harmony/load/load_audio.py
+++ b/pype/plugins/harmony/load/load_audio.py
@@ -1,6 +1,6 @@
 from avalon import api, harmony
 
-
+sig = harmony.signature()
 func = """
 function getUniqueColumnName( column_prefix )
 {
@@ -18,14 +18,14 @@ function getUniqueColumnName( column_prefix )
     return column_name;
 }
 
-function func(args)
+function %s(args)
 {
     var uniqueColumnName = getUniqueColumnName(args[0]);
     column.add(uniqueColumnName , "SOUND");
     column.importSound(uniqueColumnName, 1, args[1]);
 }
-func
-"""
+%s
+""" % (sig, sig)
 
 
 class ImportAudioLoader(api.Loader):
diff --git a/pype/plugins/harmony/load/load_background.py b/pype/plugins/harmony/load/load_background.py
index f96fc275be..5ef4535576 100644
--- a/pype/plugins/harmony/load/load_background.py
+++ b/pype/plugins/harmony/load/load_background.py
@@ -1,11 +1,9 @@
 import os
-import uuid
-
-import clique
+import json
 
 from avalon import api, harmony
 import pype.lib
-import json
+
 
 copy_files = """function copyFile(srcFilename, dstFilename)
 {
@@ -256,7 +254,9 @@ class BackgroundLoader(api.Loader):
         container_nodes = []
 
         for layer in sorted(layers):
-            file_to_import = [os.path.join(bg_folder, layer).replace("\\", "/")]
+            file_to_import = [
+                os.path.join(bg_folder, layer).replace("\\", "/")
+            ]
 
             read_node = harmony.send(
                 {
@@ -301,8 +301,10 @@ class BackgroundLoader(api.Loader):
         print(container)
 
         for layer in sorted(layers):
-            file_to_import = [os.path.join(bg_folder, layer).replace("\\", "/")]
-            print(20*"#")
+            file_to_import = [
+                os.path.join(bg_folder, layer).replace("\\", "/")
+            ]
+            print(20 * "#")
             print(f"FILE TO REPLACE: {file_to_import}")
             print(f"LAYER: {layer}")
             node = harmony.find_node_by_name(layer, "READ")
@@ -324,9 +326,9 @@ class BackgroundLoader(api.Loader):
                 )["result"]
                 container['nodes'].append(read_node)
 
-
             # Colour node.
-            func = """function func(args){
+            sig = harmony.signature("set_color")
+            func = """function %s(args){
                 for( var i =0; i <= args[0].length - 1; ++i)
                 {
                     var red_color = new ColorRGBA(255, 0, 0, 255);
@@ -339,8 +341,8 @@ class BackgroundLoader(api.Loader):
                     }
                 }
             }
-            func
-            """
+            %s
+            """ % (sig, sig)
             if pype.lib.is_latest(representation):
                 harmony.send({"function": func, "args": [node, "green"]})
             else:
diff --git a/pype/plugins/harmony/load/load_imagesequence.py b/pype/plugins/harmony/load/load_imagesequence.py
index c5f50a7d23..056d5554ad 100644
--- a/pype/plugins/harmony/load/load_imagesequence.py
+++ b/pype/plugins/harmony/load/load_imagesequence.py
@@ -301,7 +301,8 @@ class ImageSequenceLoader(api.Loader):
         )
 
         # Colour node.
-        func = """function func(args){
+        sig = harmony.signature("copyFile")
+        func = """function %s(args){
             for( var i =0; i <= args[0].length - 1; ++i)
             {
                 var red_color = new ColorRGBA(255, 0, 0, 255);
@@ -314,8 +315,8 @@ class ImageSequenceLoader(api.Loader):
                 }
             }
         }
-        func
-        """
+        %s
+        """ % (sig, sig)
         if pype.lib.is_latest(representation):
             harmony.send({"function": func, "args": [node, "green"]})
         else:
diff --git a/pype/plugins/harmony/load/load_template_workfile.py b/pype/plugins/harmony/load/load_template_workfile.py
index 3e79cc1903..1d1fd7f7be 100644
--- a/pype/plugins/harmony/load/load_template_workfile.py
+++ b/pype/plugins/harmony/load/load_template_workfile.py
@@ -21,15 +21,16 @@ class ImportTemplateLoader(api.Loader):
         with zipfile.ZipFile(zip_file, "r") as zip_ref:
             zip_ref.extractall(template_path)
 
-        func = """function func(args)
+        sig = harmony.signature("paste")
+        func = """function %s(args)
         {
             var template_path = args[0];
             var drag_object = copyPaste.pasteTemplateIntoGroup(
                 template_path, "Top", 1
             );
         }
-        func
-        """
+        %s
+        """ % (sig, sig)
 
         harmony.send({"function": func, "args": [template_path]})
 
diff --git a/pype/plugins/harmony/publish/collect_current_file.py b/pype/plugins/harmony/publish/collect_current_file.py
index aab66c2b62..40c154e847 100644
--- a/pype/plugins/harmony/publish/collect_current_file.py
+++ b/pype/plugins/harmony/publish/collect_current_file.py
@@ -13,15 +13,16 @@ class CollectCurrentFile(pyblish.api.ContextPlugin):
 
     def process(self, context):
         """Inject the current working file"""
-        func = """function func()
+        sig = harmony.signature()
+        func = """function %s()
         {
             return (
                 scene.currentProjectPath() + "/" +
                 scene.currentVersionName() + ".xstage"
             );
         }
-        func
-        """
+        %s
+        """ % (sig, sig)
 
         current_file = harmony.send({"function": func})["result"]
         context.data["currentFile"] = os.path.normpath(current_file)
diff --git a/pype/plugins/harmony/publish/collect_palettes.py b/pype/plugins/harmony/publish/collect_palettes.py
index 2a2c1066c0..dc573c381f 100644
--- a/pype/plugins/harmony/publish/collect_palettes.py
+++ b/pype/plugins/harmony/publish/collect_palettes.py
@@ -13,7 +13,8 @@ class CollectPalettes(pyblish.api.ContextPlugin):
     hosts = ["harmony"]
 
     def process(self, context):
-        func = """function func()
+        sig = harmony.signature()
+        func = """function %s()
         {
             var palette_list = PaletteObjectManager.getScenePaletteList();
 
@@ -26,8 +27,8 @@ class CollectPalettes(pyblish.api.ContextPlugin):
 
             return palettes;
         }
-        func
-        """
+        %s
+        """ % (sig, sig)
         palettes = harmony.send({"function": func})["result"]
 
         for name, id in palettes.items():
diff --git a/pype/plugins/harmony/publish/extract_palette.py b/pype/plugins/harmony/publish/extract_palette.py
index 9bca005278..9b5f1f5dc9 100644
--- a/pype/plugins/harmony/publish/extract_palette.py
+++ b/pype/plugins/harmony/publish/extract_palette.py
@@ -13,14 +13,15 @@ class ExtractPalette(pype.api.Extractor):
     families = ["harmony.palette"]
 
     def process(self, instance):
-        func = """function func(args)
+        sig = harmony.signature()
+        func = """function %s(args)
         {
             var palette_list = PaletteObjectManager.getScenePaletteList();
             var palette = palette_list.getPaletteById(args[0]);
             return (palette.getPath() + "/" + palette.getName() + ".plt");
         }
-        func
-        """
+        %s
+        """ % (sig, sig)
         palette_file = harmony.send(
             {"function": func, "args": [instance.data["id"]]}
         )["result"]
diff --git a/pype/plugins/harmony/publish/extract_render.py b/pype/plugins/harmony/publish/extract_render.py
index 8467f6710e..98a47de2f6 100644
--- a/pype/plugins/harmony/publish/extract_render.py
+++ b/pype/plugins/harmony/publish/extract_render.py
@@ -130,6 +130,9 @@ class ExtractRender(pyblish.api.InstancePlugin):
         }
         instance.data["representations"] = [representation, thumbnail]
 
+        if audio_path and os.path.exists(audio_path):
+            instance.data["audio"] = [{"filename": audio_path}]
+
         # Required for extract_review plugin (L222 onwards).
         instance.data["frameStart"] = frame_start
         instance.data["frameEnd"] = frame_end
diff --git a/pype/plugins/harmony/publish/extract_template.py b/pype/plugins/harmony/publish/extract_template.py
index eaebbbcd37..33e0341c8d 100644
--- a/pype/plugins/harmony/publish/extract_template.py
+++ b/pype/plugins/harmony/publish/extract_template.py
@@ -2,7 +2,7 @@ import os
 import shutil
 
 import pype.api
-import avalon.harmony
+from avalon import harmony
 import pype.hosts.harmony
 
 
@@ -15,9 +15,9 @@ class ExtractTemplate(pype.api.Extractor):
 
     def process(self, instance):
         staging_dir = self.staging_dir(instance)
-        filepath = os.path.join(staging_dir, "{}.tpl".format(instance.name))
+        filepath = os.path.join(staging_dir, f"{instance.name}.tpl")
 
-        self.log.info("Outputting template to {}".format(staging_dir))
+        self.log.info(f"Outputting template to {staging_dir}")
 
         dependencies = []
         self.get_dependencies(instance[0], dependencies)
@@ -50,21 +50,22 @@ class ExtractTemplate(pype.api.Extractor):
         # Prep representation.
         os.chdir(staging_dir)
         shutil.make_archive(
-            "{}".format(instance.name),
+            f"{instance.name}",
             "zip",
-            os.path.join(staging_dir, "{}.tpl".format(instance.name))
+            os.path.join(staging_dir, f"{instance.name}.tpl")
         )
 
         representation = {
             "name": "tpl",
             "ext": "zip",
-            "files": "{}.zip".format(instance.name),
+            "files": f"{instance.name}.zip",
             "stagingDir": staging_dir
         }
         instance.data["representations"] = [representation]
 
     def get_backdrops(self, node):
-        func = """function func(probe_node)
+        sig = harmony.signature()
+        func = """function %s(probe_node)
         {
             var backdrops = Backdrop.backdrops("Top");
             var valid_backdrops = [];
@@ -90,14 +91,15 @@ class ExtractTemplate(pype.api.Extractor):
             }
             return valid_backdrops;
         }
-        func
-        """
-        return avalon.harmony.send(
+        %s
+        """ % (sig, sig)
+        return harmony.send(
             {"function": func, "args": [node]}
         )["result"]
 
     def get_dependencies(self, node, dependencies):
-        func = """function func(args)
+        sig = harmony.signature()
+        func = """function %s(args)
         {
             var target_node = args[0];
             var numInput = node.numberOfInputPorts(target_node);
@@ -108,10 +110,10 @@ class ExtractTemplate(pype.api.Extractor):
             }
             return dependencies;
         }
-        func
-        """
+        %s
+        """ % (sig, sig)
 
-        current_dependencies = avalon.harmony.send(
+        current_dependencies = harmony.send(
             {"function": func, "args": [node]}
         )["result"]
 
diff --git a/pype/plugins/harmony/publish/extract_workfile.py b/pype/plugins/harmony/publish/extract_workfile.py
index 41d7868857..09bf0db860 100644
--- a/pype/plugins/harmony/publish/extract_workfile.py
+++ b/pype/plugins/harmony/publish/extract_workfile.py
@@ -36,7 +36,7 @@ class ExtractWorkfile(pype.api.Extractor):
             os.path.join(staging_dir, f"{instance.name}.tpl")
         )
         # Check if archive is ok
-        with ZipFile(os.path.basename("f{instance.name}.zip")) as zr:
+        with ZipFile(os.path.basename(f"{instance.name}.zip")) as zr:
             if zr.testzip() is not None:
                 raise Exception("File archive is corrupted.")
 
diff --git a/pype/plugins/harmony/publish/validate_audio.py b/pype/plugins/harmony/publish/validate_audio.py
index 898ad8ae70..b949b0a6e6 100644
--- a/pype/plugins/harmony/publish/validate_audio.py
+++ b/pype/plugins/harmony/publish/validate_audio.py
@@ -1,10 +1,8 @@
-import json
 import os
 
 import pyblish.api
 
-import avalon.harmony
-import pype.hosts.harmony
+from avalon import harmony
 
 
 class ValidateAudio(pyblish.api.InstancePlugin):
@@ -30,7 +28,7 @@ class ValidateAudio(pyblish.api.InstancePlugin):
         }
         func
         """
-        result = avalon.harmony.send(
+        result = harmony.send(
             {"function": func, "args": [instance[0]]}
         )["result"]