For me, I have 2 to begin with for the tracking stage. This makes it easier to punch in than trying to punch in the middle of a part and then edit it to sound normal. Instead, I have them play along to the part before they have to punch in, and then keep going. This way, I can edit it much easier and it sounds a lot more natural. Eventually, those two tracks get bounced into one track, which I then duplicate. I take the copy and run it through a distortion of some kind, either plug-in or hardware (pedal, and then back into the interface...kinda like reamping) and also high pass the hell out of it, then low pass the original un-distorted track. Then I have two tracks of bass, one a natural sound, the other being distorted. From there I blend them together and have both going to a bus where I can compress/limit and EQ both at the same time, and adjust the level of their mix with the rest of the instruments.
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