How to set audio bitrate in ffmpeg?

Im modding a game (command and conquer 1) to add some music to it, and in their mod wiki they say you need to convert your audio files to 16-bit 22050 Hz WAV with a program of your choice. So im trying to do this with ffmpeg, but not sure if im doing it right. The command I used is as follows:

Code:ffmpeg -i rick-roll.mp3 -b:a 16 -ar 22050 rickroll.wavDoes that look right to you? Cause when I check the audio properties (via a simple file manager) the Hz value (aka sample rate) is correct, but the bitrate says 705kbps (and not 16 bits)...