Update app.py

app.py

@@ -60,8 +60,8 @@ def record(audio):
 
 def butter_bandpass(sr, order=5):
     nyquist = 0.5 * sr
-    low = low_frequency / nyquist
-    high = high_frequency / nyquist
+    low = (low_frequency-500)  / nyquist
+    high = (high_frequency+500) / nyquist
     coef = butter(order, [low, high], btype='band')
     b = coef[0]
     a = coef[1]