Change folder structure, add solution to the root.

DaggerFramework/Source/Audio/DummyAudioBackend.cs

@@ -0,0 +1,45 @@
+namespace DaggerFramework.Audio
+{
+    public class DummyAudioBackend : AudioBackend
+    {
+        public override void AddBusEffect<T>(T effect, string bus = "Master")
+        {
+            return;
+        }
+
+        public override void CreateBus(string busName)
+        {
+            return;
+        }
+
+        public override float GetBusVolume(string busName)
+        {
+            return 0.0f;
+        }
+
+        public override void Initialize()
+        {
+            return;
+        }
+
+        public override void SetBusVolume(string busName, float volume)
+        {
+            return;
+        }
+
+        public override void Shutdown()
+        {
+            return;
+        }
+
+        public override void Update()
+        {
+            return;
+        }
+
+        public override void PlaySound(Sound sound, string bus = "Master", float pitch = 1, float volume = 1)
+        {
+            return;
+        }
+    }
+}