This whole bass issue is the primary reason "mastering" requires a great room and quality monitors. 95% of time mastering is done without a sub attached on purpose.
Computers and DAW Pro Audio Forums Moderator
Pro Horn player & Piano Technician
Kranking out Kopprasch since 1977
With this kind of content, you don't want it to be normalized at 100%. The MP3 Pro encoder in Audition is wonderful. I use it all the time. What you should be doing is setting your normalization to DB instead of percentage. Tweak the normalization to -.6 DB, on your master ".wav " file. Then convert to 128 kb per second MP3. It should sound good then. 320 kb per second only extends the frequency response of the high frequencies it does not prevent any kind of distortion. There will always be MP3 artifacting since you are taking out 80% of the data. The algorithm can't exactly ask you what data you want removed. And not everybody wants to take or accept 320 kb per second MP3's.
When it gets to 100%, a lot of digital to analog convertors really crap out. I personally didn't hear any distortion other than some clicks which may have been indicative of previous overloads? Your file was rather brief so it was hard to tell. That low-end was rather abundant. And how do you expect that to play on a system with subwoofer's? It's already over subbed and over woofed. We had an earthquake here in Northern Virginia last year and I don't want to feel another one.
And what with, I bid you adieu.
Mx. Remy Ann David