Is this double tracking we’re talking about the same as used for recording guitars? Isn’t taking advantage of phasing issues to create a wider image the purpose of double tracking? Sorry I’m a guitarist I don’t have any guitar/bass libraries so I don’t know with a sample library if it’d work or not.
Not exactly. There is a little bit of intermittent phasing here or there when you're double tracking, but the phase is still not perfectly aligned between the left and right because they aren't identical recordings. They're recordings on the same note, but there are subtle differences. Using the same sample means there AREN'T any differences so the phasing is perfectly aligned throughout. You don't get the same result, but with the transposition trick, you do!