Update scores/mcd.py

scores/mcd.py

@@ -6,8 +6,6 @@ import pyworld
 import pysptk
 from fastdtw import fastdtw
 from scipy.spatial.distance import euclidean
-#from scores.helper import calculate_mcd
-#from pymcd.mcd import Calculate_MCD
 #refer to : https://github.com/chenqi008/pymcd/blob/main/pymcd/mcd.py
 class MCD(ScoreBasis):
     def __init__(self):
@@ -18,7 +16,7 @@ class MCD(ScoreBasis):
 
     def windowed_scoring(self, audios, score_rate):
         if len(audios) != 2:
-            raise ValueError('MCD needs a reference and a test signals.')
+            return None
         return self.mcd_toolbox.calculate_mcd(audios[1], audios[0], score_rate)
 
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