I haven't done any side-by-side comparison, but I'd venture to say that the bass boost isn't working.

Funny, I'd come to the opposite conclusion last night.

True, FM stations always sound like their bass is boosted compared to MP3s, because they do over-EQ their signals before sending them out. But that's always been around, there's nothing unusual about that.

What I had noticed is that, over and above the bass-boosting the stations already did, the player would boost the bass in radio mode yet again, making it sound truly unnatural, especially when announcers were speaking.

Gen's 246 binary he released yesterday seems to have (for me) removed the extra bass boost as intended. However, I did not A/B test this feature by changing the INI file and running back and forth to my car. Someone should do this to be sure.