Larry I think what Jack is suggesting is running your bass track thru an amplifier sim.
As to the bass, and I've mentioned this before, I think some of the bass lines are a bit too "busy" on this one.
In the opening section you're following the keys, and for me, its a bit distracting.
(its your tune, so your production; just my nickel98 - take it with a grain of salt)
That being said this "ambient pop" continues to grow on me...
t