I have used it once for Hello In There (John Prine). I saw him live and the bass used for it was an upright acoustic bass that was bowed. I found out it could be duplicated well enough with the pedal bass feature. The way it worked for me (with midi synth strings) is that it plays the root of the chord entered as a hold w/o having to specify the root in the dialog box and plays it for the number of bars entered in that dialog box. In other words if I enter C in a bar and set the pedal to 'whole note' I don't have to input C in the set on box, it just plays that. I only put in a different note if needed such as C/E.
It might work the same in some other way but I didn't find another way that worked the way pedal does.