http://noodleboss.com | How to Change MP3 Bitrate Upon Export on Adobe Audition 3.0
http://noodleboss.com/how-to-change-mp3-bitrate-on-adobe-audition-3-0/
Altering MP3 bitrate on Adobe Audition has been a difficulty to some; it had been so for me back then. There had been issues with exporting an MP3 file that once exported, the bitrate is always defaulted to 128Kbps.