BIAB uses the CODECs installed on your Windows system, which by default are limited to 56kbps. That is never going to sound good, except maybe for voice only applications.
I did not know that. Since Sonar didn't come with a converter..... well, it had a 30 day free trial then you could buy the converter..... I never bought the converter and chose to go third party external, so when I started using BB/RB.... I never even considered using the built in..... and since I export to Sonar anyway.......