Greetings,

Well, it is possible to kill 2 birds with one stone (so to speak)

Just use Celemony Melodyne! Take your bass real track audio track, put it into melodyne, move the notes wherever you want in pitch or time. It works so well, I now use it on almost all my Real tracks. In this way you can get midi like custom note input, but Real tracks sound.....It truly can't be beat!!!

Give it a try,
Ed

Postscript>Here is a YouTube link to a demo of this technique>

https://www.youtube.com/watch?v=Pe0nxkE28_4&feature=related

And yes, for all those "haters" out there, this does make it super easy for anyone to change vocals, and any other instruments....but so did drum machines, Band in a Box, and Vocal Harmony boxes............