diff --git a/nodes/audio_nodes.py b/nodes/audio_nodes.py
index 541996a..c86f716 100644
--- a/nodes/audio_nodes.py
+++ b/nodes/audio_nodes.py
@@ -1,5 +1,5 @@
 from .audio_utils import simple_signal_operations
-#from typing import Callable
+from typing import Callable
 
 import numpy as np
 import librosa
@@ -7,60 +7,119 @@ import librosa
 CATEGORY = "AudioReactive"
 
 
-# class SimpleSignalOperation:
-#     CATEGORY=CATEGORY
-#     RETURN_TYPES=("SIGNAL",)
-#     FUNCTION = "main"
+class SimpleSignalOperation:
+    CATEGORY=CATEGORY
+    RETURN_TYPES=("SIGNAL",)
+    FUNCTION = "main"
 
-#     f: Callable = None # lazy abstract method
+    f: Callable = None # lazy abstract method
   
-#     @classmethod
-#     def INPUT_TYPES(cls):
-#         outv = {
-#             "required": {
-#                 "signal": ("SIGNAL",{}),
-#             }
-#         }
-#         return outv
+    @classmethod
+    def INPUT_TYPES(cls):
+        outv = {
+            "required": {
+                "signal": ("SIGNAL",{}),
+            }
+        }
+        return outv
 
-#     def main(self, signal, **kargs):
-#         y, sr = signal.get("y"), signal.get("sr")
-#         y, sr = self.f(y, sr)
-#         return {"y":y, "sr":sr)
+    def main(self, signal, **kargs):
+        y, sr = signal.get("y"), signal.get("sr")
+        y, sr = self.f(y, sr)
+        return {"y":y, "sr":sr}
 
 
 # simple_signal_operations = {
 #     'raw': lambda y, sr: y,
 #     ##########
-#     'rms': lambda y, sr: normalize(librosa.feature.rms(y=y).ravel(), sr),
+
+
+
 #     'novelty': librosa.onset.onset_strength,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
+  
+
 #     'predominant_pulse': librosa.beat.plp,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'bandpass': bandpass,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'harmonic': lambda y, sr: librosa.effects.harmonic(y=y),
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'percussive': lambda y, sr: librosa.effects.percussive(y=y),
+class OpNovelty:
+    f = simple_signal_operations['rms']
 #     ##########
 #     'pow2': lambda y, sr: y**2,
+
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'stretch': stretch,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'sqrt': sqrt,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'smoosh': smoosh,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'pow':_pow,
+class OpNovelty:
+    f = simple_signal_operations['rms']
 #     #################
+
 #     'smooth': smooth,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'sustain': sustain,
+class OpNovelty:
+    f = simple_signal_operations['rms']
 #     # #########
+
 #     'normalize': normalize,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'abs': lambda y, sr: np.abs(np.abs(y)),
+class OpNovelty:
+    f = simple_signal_operations['rms']
+
 #     'threshold': threshold,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+  
 #     'clamp': clamp,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+  
 #     'modulo': modulo,
+class OpNovelty:
+    f = simple_signal_operations['rms']
+  
 #     'quantize':quantize,
+class OpNovelty:
+    f = simple_signal_operations['rms']
 # }
 
+
 # can i just metaclass this?
-#class OpRms(SimpleSignalOperation):
-class OpRms:
+class OpRms(SimpleSignalOperation):
+#     'rms': lambda y, sr: normalize(librosa.feature.rms(y=y).ravel(), sr),
+#class OpRms:
     f = simple_signal_operations['rms']
-    
+
 #class SimpleSignalOperation:
     CATEGORY=CATEGORY
     RETURN_TYPES=("SIGNAL",)