There's another way, although manual.
Use the --sampledist or --blockdist parameters to look at the lsb / msb distribution for the audio on a per sample basis or a per codec-block basis:
Lossless Input:lossyWAV beta 1.2.4a, Copyright © 2007-2011 Nick Currie. Copyleft.
Processed : 04/03/2011 19:50:07
Settings : --quality standard
Filename : eig.wav
File Info : 44.10kHz; 2 channel; 16 bit, 00:15.00, 2.523MiB
Results : 2.7483 bits; 14.20x; 00:01.05; [F]
Codec-block least significant bit (lsb) distribution.
+---+------------------------------------+------------------------------------+
|Bit|Input codec-block lsb distribution |Output codec-block lsb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.00%|............................| 0.00%|............................|
| 0|100.00%|OOOOOOOOOOOOOOOOOOOOOOOOOOOO| 2.47%|O...........................|
| 1| 0.00%|............................| 5.34%|O...........................|
| 2| 0.00%|............................| 43.16%|OOOOOOOOOOOO................|
| 3| 0.00%|............................| 39.29%|OOOOOOOOOOO.................|
| 4| 0.00%|............................| 9.28%|OOO.........................|
| 5| 0.00%|............................| 0.46%|............................|
| 6| 0.00%|............................| 0.00%|............................|
| 7| 0.00%|............................| 0.00%|............................|
| 8| 0.00%|............................| 0.00%|............................|
| 9| 0.00%|............................| 0.00%|............................|
| 10| 0.00%|............................| 0.00%|............................|
| 11| 0.00%|............................| 0.00%|............................|
| 12| 0.00%|............................| 0.00%|............................|
| 13| 0.00%|............................| 0.00%|............................|
| 14| 0.00%|............................| 0.00%|............................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+
Codec-block most significant bit (msb) distribution.
+---+------------------------------------+------------------------------------+
|Bit|Input codec-block lsb distribution |Output codec-block lsb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.00%|............................| 0.00%|............................|
| 0| 0.00%|............................| 0.00%|............................|
| 1| 0.00%|............................| 0.00%|............................|
| 2| 0.00%|............................| 0.00%|............................|
| 3| 0.00%|............................| 0.00%|............................|
| 4| 0.00%|............................| 0.00%|............................|
| 5| 0.00%|............................| 0.00%|............................|
| 6| 0.00%|............................| 0.00%|............................|
| 7| 0.00%|............................| 0.00%|............................|
| 8| 0.00%|............................| 0.00%|............................|
| 9| 1.86%|O...........................| 1.78%|............................|
| 10| 12.76%|OOOO........................| 12.84%|OOOO........................|
| 11| 17.56%|OOOOO.......................| 17.48%|OOOOO.......................|
| 12| 24.05%|OOOOOOO.....................| 24.05%|OOOOOOO.....................|
| 13| 18.72%|OOOOO.......................| 18.79%|OOOOO.......................|
| 14| 25.06%|OOOOOOO.....................| 25.06%|OOOOOOO.....................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+
Sample least significant bit (lsb) distribution.
+---+------------------------------------+------------------------------------+
|Bit|Input sample lsb distribution |Output sample lsb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.03%|............................| 0.18%|............................|
| 0| 50.03%|OOOOOOOOOOOOOO..............| 0.84%|............................|
| 1| 24.93%|OOOOOOO.....................| 2.11%|O...........................|
| 2| 12.50%|OOOO........................| 16.61%|OOOOO.......................|
| 3| 6.26%|OO..........................| 32.32%|OOOOOOOOO...................|
| 4| 3.14%|O...........................| 23.17%|OOOOOO......................|
| 5| 1.55%|............................| 12.47%|OOO.........................|
| 6| 0.79%|............................| 6.25%|OO..........................|
| 7| 0.39%|............................| 3.10%|O...........................|
| 8| 0.20%|............................| 1.56%|............................|
| 9| 0.10%|............................| 0.77%|............................|
| 10| 0.04%|............................| 0.38%|............................|
| 11| 0.02%|............................| 0.16%|............................|
| 12| 0.01%|............................| 0.06%|............................|
| 13| 0.00%|............................| 0.02%|............................|
| 14| 0.00%|............................| 0.01%|............................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+
Sample most significant bit (msb) distribution.
+---+-------+----------------------------+-------+----------------------------+
|Bit|Input sample msb distribution |Output sample msb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.18%|............................| 0.03%|............................|
| 0| 0.00%|............................| 0.05%|............................|
| 1| 0.01%|............................| 0.11%|............................|
| 2| 0.11%|............................| 0.22%|............................|
| 3| 0.40%|............................| 0.42%|............................|
| 4| 0.81%|............................| 0.81%|............................|
| 5| 1.62%|............................| 1.62%|............................|
| 6| 3.22%|O...........................| 3.22%|O...........................|
| 7| 6.13%|OO..........................| 6.13%|OO..........................|
| 8| 11.07%|OOO.........................| 11.05%|OOO.........................|
| 9| 16.31%|OOOOO.......................| 16.28%|OOOOO.......................|
| 10| 18.41%|OOOOO.......................| 18.37%|OOOOO.......................|
| 11| 16.78%|OOOOO.......................| 16.75%|OOOOO.......................|
| 12| 11.77%|OOO.........................| 11.76%|OOO.........................|
| 13| 9.10%|OOO.........................| 9.10%|OOO.........................|
| 14| 4.08%|O...........................| 4.08%|O...........................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+
Lossy Input:lossyWAV beta 1.2.4a, Copyright © 2007-2011 Nick Currie. Copyleft.
Processed : 04/03/2011 20:16:54
Settings : --quality standard
Filename : eig.wav
File Info : 44.10kHz; 2 channel; 16 bit, 00:15.00, 2.523MiB
Results : 2.7015 bits; 14.80x; 00:01.01; [F]
Codec-block least significant bit (lsb) distribution.
+---+------------------------------------+------------------------------------+
|Bit|Input codec-block lsb distribution |Output codec-block lsb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.00%|............................| 0.00%|............................|
| 0| 2.47%|O...........................| 2.47%|O...........................|
| 1| 5.34%|O...........................| 3.09%|O...........................|
| 2| 43.16%|OOOOOOOOOOOO................| 36.66%|OOOOOOOOOO..................|
| 3| 39.29%|OOOOOOOOOOO.................| 44.62%|OOOOOOOOOOOO................|
| 4| 9.28%|OOO.........................| 11.91%|OOO.........................|
| 5| 0.46%|............................| 1.24%|............................|
| 6| 0.00%|............................| 0.00%|............................|
| 7| 0.00%|............................| 0.00%|............................|
| 8| 0.00%|............................| 0.00%|............................|
| 9| 0.00%|............................| 0.00%|............................|
| 10| 0.00%|............................| 0.00%|............................|
| 11| 0.00%|............................| 0.00%|............................|
| 12| 0.00%|............................| 0.00%|............................|
| 13| 0.00%|............................| 0.00%|............................|
| 14| 0.00%|............................| 0.00%|............................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+
Codec-block most significant bit (msb) distribution.
+---+------------------------------------+------------------------------------+
|Bit|Input codec-block lsb distribution |Output codec-block lsb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.00%|............................| 0.00%|............................|
| 0| 0.00%|............................| 0.00%|............................|
| 1| 0.00%|............................| 0.00%|............................|
| 2| 0.00%|............................| 0.00%|............................|
| 3| 0.00%|............................| 0.00%|............................|
| 4| 0.00%|............................| 0.00%|............................|
| 5| 0.00%|............................| 0.00%|............................|
| 6| 0.00%|............................| 0.00%|............................|
| 7| 0.00%|............................| 0.00%|............................|
| 8| 0.00%|............................| 0.00%|............................|
| 9| 1.78%|............................| 1.78%|............................|
| 10| 12.84%|OOOO........................| 12.84%|OOOO........................|
| 11| 17.48%|OOOOO.......................| 17.48%|OOOOO.......................|
| 12| 24.05%|OOOOOOO.....................| 24.05%|OOOOOOO.....................|
| 13| 18.79%|OOOOO.......................| 18.79%|OOOOO.......................|
| 14| 25.06%|OOOOOOO.....................| 25.06%|OOOOOOO.....................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+
Sample least significant bit (lsb) distribution.
+---+------------------------------------+------------------------------------+
|Bit|Input sample lsb distribution |Output sample lsb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.18%|............................| 0.20%|............................|
| 0| 0.84%|............................| 0.84%|............................|
| 1| 2.11%|O...........................| 1.53%|............................|
| 2| 16.61%|OOOOO.......................| 12.96%|OOOO........................|
| 3| 32.32%|OOOOOOOOO...................| 32.73%|OOOOOOOOO...................|
| 4| 23.17%|OOOOOO......................| 24.65%|OOOOOOO.....................|
| 5| 12.47%|OOO.........................| 13.65%|OOOO........................|
| 6| 6.25%|OO..........................| 6.81%|OO..........................|
| 7| 3.10%|O...........................| 3.40%|O...........................|
| 8| 1.56%|............................| 1.71%|............................|
| 9| 0.77%|............................| 0.84%|............................|
| 10| 0.38%|............................| 0.41%|............................|
| 11| 0.16%|............................| 0.18%|............................|
| 12| 0.06%|............................| 0.06%|............................|
| 13| 0.02%|............................| 0.02%|............................|
| 14| 0.01%|............................| 0.01%|............................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+
Sample most significant bit (msb) distribution.
+---+-------+----------------------------+-------+----------------------------+
|Bit|Input sample msb distribution |Output sample msb distribution |
+---+-------+----------------------------+-------+----------------------------+
|NUL| 0.20%|............................| 0.18%|............................|
| 0| 0.00%|............................| 0.00%|............................|
| 1| 0.01%|............................| 0.01%|............................|
| 2| 0.09%|............................| 0.11%|............................|
| 3| 0.39%|............................| 0.40%|............................|
| 4| 0.81%|............................| 0.81%|............................|
| 5| 1.62%|............................| 1.62%|............................|
| 6| 3.22%|O...........................| 3.22%|O...........................|
| 7| 6.13%|OO..........................| 6.13%|OO..........................|
| 8| 11.07%|OOO.........................| 11.07%|OOO.........................|
| 9| 16.31%|OOOOO.......................| 16.31%|OOOOO.......................|
| 10| 18.41%|OOOOO.......................| 18.41%|OOOOO.......................|
| 11| 16.78%|OOOOO.......................| 16.78%|OOOOO.......................|
| 12| 11.77%|OOO.........................| 11.77%|OOO.........................|
| 13| 9.10%|OOO.........................| 9.10%|OOO.........................|
| 14| 4.08%|O...........................| 4.08%|O...........................|
| 15| 0.00%|............................| 0.00%|............................|
+---+-------+----------------------------+-------+----------------------------+