Even in million dollar recording studios the tracks are mixed after the actual recording. So I doubt a little trial and error would get you what you want. Even the ability to mix multitrack recordings in live shows may not give you exactly what you want. But, it sure would be closer.
Yigba, the only place I kind of side with you here is that the dl1608 has no, and will never have, multitrack capabilities. So anyone here asking for it, or complaining about it, has the wrong mixer.