diff --git a/calib.py b/calib.py
index ac4bb4e..1dc68ee 100755
--- a/calib.py
+++ b/calib.py
@@ -3,7 +3,6 @@ import numpy as np
 import common
 import sigproc
 import wave
-import pylab
 
 Tsample = 1
 t = np.arange(int(Tsample * common.Fs)) * common.Ts