Nice to see that the music, specifically, is addressed here
I had this on the Dreamcast back in the day. Ended up trading it in towards something else (Sega GT, maybe?) but always kinda missed it. later, when I saw the Windows PC version on clearance at a Toys R Us (of all places??) I went for it, and was thrilled to have the game back again!
But the music. While it did technically play during races, it was only at, maybe, 10% of the volume it should have been. I spent nearly every race cranking the volume at the start, only to have to rush to turn it back down again before crossing the finish line.
Voices and the ending music still played at normal volume, so if I was slow on the dial...
"FINISHHHHHHHH!!"
It would boom through the house, followed by the bass-y end-of-day tune. Got to be so much of a hassle, I just played the game in silence >_>