Quick Question, I hope

I have a .wav file that I generate with a computer
program.  Been doing this for some time and using
lame to convert to .mp3, but at some time during
a new release the conversion scheme changed.

Here is the .wav file:

<http://www.k7qo.net/1.wav>

Here is the converted .mp3 file using 
LAME 64bits version 3.98.4 (http://www.mp3dev.org/)

<http://www.k7qo.net/1.mp3>

I'd like to see the monotone output, but with a
constant waveform instead of the spikes and dips.
I hope this is not out of line and appropriate.

TIA,

chuck