upgrade to 2021.2

Assets/WasapiAudio/Scripts/Unity/VfxAudioSpectrumDataBinder.cs

@@ -38,6 +38,12 @@ namespace Assets.WasapiAudio.Scripts.Unity
             _texture.Apply();
         }
 
+        public override bool IsValid(VisualEffect component)
+        {
+            return component.HasTexture(SpectrumDataTextureParameter)
+                && component.HasFloat(SpectrumSizeParameter);
+        }
+
         public override void UpdateBinding(VisualEffect component)
         {
             base.UpdateBinding(component);