diff --git a/Lib/sunaudio.py b/Lib/sunaudio.py
index b6e5047..96def15 100644
--- a/Lib/sunaudio.py
+++ b/Lib/sunaudio.py
@@ -1,7 +1,5 @@
 # Module 'sunaudio' -- interpret sun audio headers
 
-import audio
-
 MAGIC = '.snd'
 
 error = 'sunaudio sound header conversion error'
@@ -9,14 +7,8 @@
 
 # convert a 4-char value to integer
 
-def c2i(data):
-	if type(data) <> type('') or len(data) <> 4:
-		raise error, 'c2i: bad arg (not string[4])'
-	bytes = audio.chr2num(data)
-	for i in (1, 2, 3):
-		if bytes[i] < 0:
-			bytes[i] = bytes[i] + 256
-	return ((bytes[0]*256 + bytes[1])*256 + bytes[2])*256 + bytes[3]
+def get_long_be(s):
+	return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3])
 
 
 # read a sound header from an open file
@@ -24,11 +16,11 @@
 def gethdr(fp):
 	if fp.read(4) <> MAGIC:
 		raise error, 'gethdr: bad magic word'
-	hdr_size = c2i(fp.read(4))
-	data_size = c2i(fp.read(4))
-	encoding = c2i(fp.read(4))
-	sample_rate = c2i(fp.read(4))
-	channels = c2i(fp.read(4))
+	hdr_size = get_long_be(fp.read(4))
+	data_size = get_long_be(fp.read(4))
+	encoding = get_long_be(fp.read(4))
+	sample_rate = get_long_be(fp.read(4))
+	channels = get_long_be(fp.read(4))
 	excess = hdr_size - 24
 	if excess < 0:
 		raise error, 'gethdr: bad hdr_size'