1diff --git i/pydub/pyaudioop.py w/pydub/pyaudioop.py
2index 8f8f017..aa6bb8c 100644
3--- i/pydub/pyaudioop.py
4+++ w/pydub/pyaudioop.py
5@@ -1,4 +1,4 @@
6-import __builtin__
7+import builtins
8 import math
9 import struct
10 from fractions import gcd
11@@ -79,7 +79,7 @@ def _get_minval(size, signed=True):
12 def _get_clipfn(size, signed=True):
13 maxval = _get_maxval(size, signed)
14 minval = _get_minval(size, signed)
15- return lambda val: __builtin__.max(min(val, maxval), minval)
16+ return lambda val: builtins.max(min(val, maxval), minval)
17
18
19 def _overflow(val, size, signed=True):
20@@ -109,7 +109,7 @@ def max(cp, size):
21 if len(cp) == 0:
22 return 0
23
24- return __builtin__.max(abs(sample) for sample in _get_samples(cp, size))
25+ return builtins.max(abs(sample) for sample in _get_samples(cp, size))
26
27
28 def minmax(cp, size):
29@@ -117,8 +117,8 @@ def minmax(cp, size):
30
31 max_sample, min_sample = 0, 0
32 for sample in _get_samples(cp, size):
33- max_sample = __builtin__.max(sample, max_sample)
34- min_sample = __builtin__.min(sample, min_sample)
35+ max_sample = builtins.max(sample, max_sample)
36+ min_sample = builtins.min(sample, min_sample)
37
38 return min_sample, max_sample
39
40@@ -542,4 +542,4 @@ def lin2adpcm(cp, size, state):
41
42
43 def adpcm2lin(cp, size, state):
44- raise NotImplementedError()
45\ No newline at end of file
46+ raise NotImplementedError()