upgrade to 2021.2

Assets/TripsitterAve.cs

@@ -6,6 +6,10 @@ public abstract class TripsitterAve : MonoBehaviour
 {
     public WasapiAudioSource source;
 
+    [SerializeReference]
+    [SerializeReferenceButton]
+    public List<SpectrumTransformer> Transformers = new List<SpectrumTransformer>();
+
     [SpectrumDataPreview]
     public SpectrumData Preview;
 
@@ -18,15 +22,20 @@ public abstract class TripsitterAve : MonoBehaviour
 
     protected float[] GetSpectrumData()
     {
-        if (source == null)
-        {
-            Debug.Log("You must set a WasapiAudioSource");
-            return null;
-        }
-
         // Get raw / unmodified spectrum data
         var spectrumData = source.GetSpectrumData();
+
+        // Run spectrum data through all configured transformers
+        if (Transformers != null && Transformers.Count > 0)
+        {
+            foreach (var transformer in Transformers)
+            {
+                spectrumData = transformer.Transform(spectrumData);
+            }
+        }
+
         Preview.Values = spectrumData;
+
         return spectrumData;
     }
 }