I'd recommend 3/4 length notes for bass, rather than half-length (32nd), just to give you more useful time per note - release stage has to be at least 35ms or so (to avoid mild fluffiness or even a click as the note fades out quicker than the fundamental's wavelength) but any longer than that is a waste of time that you could add to the sustain, giving you a tighter, fuller sound - think of it as compression at sound design stage.
BTW, the wavelength thing is also why you can't compress bass with very quick attack/release (below 50ms, combined) as such compression will mess up frequencies below that time/wavelength (and the lower the freq the worse it gets). 20Hz needs 50ms for a full cycle... Just thought I'd mention it