diff --git a/calibrate.py b/calibrate.py
index 903d3fa..8bae50c 100644
--- a/calibrate.py
+++ b/calibrate.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import numpy as np
 import common
 import sigproc
diff --git a/errors.py b/errors.py
old mode 100644
new mode 100755
index 9b69767..391b0cf
--- a/errors.py
+++ b/errors.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import common
 import sys
 
diff --git a/recv.py b/recv.py
old mode 100644
new mode 100755
index e396f75..15275f1
--- a/recv.py
+++ b/recv.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import numpy as np
 import logging
 import itertools
@@ -145,6 +146,8 @@ def receive(signal, freqs):
 
 def main(fname):
 
+    log.info('Running MODEM @ {:.1f} kbps'.format(sigproc.modem_bps / 1e3))
+
     _, x = load(open(fname, 'rb'))
     result = detect(x, Fc)
     if result is None:
diff --git a/send.py b/send.py
old mode 100644
new mode 100755
index d8d3bbf..c09a033
--- a/send.py
+++ b/send.py
@@ -1,10 +1,10 @@
+#!/usr/bin/env python
 import numpy as np
 
 import time
 import logging
 import itertools
 
-logging.basicConfig(level=0, format='%(message)s')
 log = logging.getLogger(__name__)
 
 import sigproc
@@ -42,11 +42,9 @@ def modulate(sig, bits):
         if all(symbols == 0):
             break
 
-if __name__ == '__main__':
-
+def main():
     import ecc
-    bps = baud * sigproc.modulator.bits_per_symbol * len(sym.carrier)
-    log.info('Running MODEM @ {:.1f} kbps'.format(bps / 1e3))
+    log.info('Running MODEM @ {:.1f} kbps'.format(sigproc.modem_bps / 1e3))
 
     with open('tx.int16', 'wb') as fd:
         start(fd, sym.carrier[carrier_index])
@@ -56,13 +54,6 @@ if __name__ == '__main__':
         bits = to_bits(ecc.encode(data))
         modulate(fd, bits)
 
-
-    from wave import play, record
-
-    r = record('rx.int16')
-    start = time.time()
-    p = play(fd.name)
-    p.wait()
-    log.debug('Took %.2f seconds', time.time() - start)
-    time.sleep(1)
-    r.stop()
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG, format='%(message)s')
+    main()
diff --git a/show.py b/show.py
old mode 100644
new mode 100755
index 21b848d..7edfb0a
--- a/show.py
+++ b/show.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import pylab
 import numpy as np
 
diff --git a/sigproc.py b/sigproc.py
index 0932323..4fceac5 100644
--- a/sigproc.py
+++ b/sigproc.py
@@ -58,6 +58,8 @@ _xs, _ys = np.linspace(-1, 1, 4), np.linspace(-1, 1, 4) # QAM-16
 _symbols = np.array([complex(x, y) for x in _xs for y in _ys]) * np.sqrt(0.5)
 modulator = QAM(_symbols)
 
+modem_bps = common.baud * modulator.bits_per_symbol * len(common.frequencies)
+
 def clip(x, lims):
     return min(max(x, lims[0]), lims[1])