Re: Bass guys - tell me about Bass Distortion
I prefer some overdrive, like vintage tube bass amps. They have a slightly rubbery quality that holds the mix together and adds texture, letting them be heard without taking away from the other instruments. Chris Squire on the classic Yes albums, especially Tales and Relayer. Jack Bruce on the Cream records. Felix Pappalardi with Mountain. Gary Thain with Uriah Heep. There must be plenty of more recent examples, but for me it's the classic ones that spring to mind right away.
Obviously it's pretty dependent on context- if there's a lot of depth or complexity going on guitarwise, I agree with uOpt that real distortion on the bass isn't often desirable. Yet IMO a little overdrive works well with straight-ahead rock stuff. Especially in a smaller group. I tend to use a bit more OD if there's only one guitar player. That way the sound stays meaty when there's a solo happening without any rhythm guitar behind it. Fills the mids and keeps a little razz going up top so there isn't such a noticeable gap in the treble when the power chords drop out. I've taken to keeping a dedicated behind-the-solo tone preset in my bass pedal. When there's more than one guitar this becomes less important and I concentrate on finding a basic sound that generally complements the guitar tones (a process which could be a thread by itself). I'll still use the "stand-out" preset to emphasize certain lines or sections. (That preset gooses some frequencies but doesn't boost the low end or pump up my overall level. This preserves the crucial balance with the kick drum and avoids driving soundmen crazy. Mostly.)
Some bass players use a compressor. I prefer the sustain of nice tubey overdrive. (Probably because I'm primarily a guitarist, even though I've been bassist for a lot of bands over the decades.) I got attached to the sound of my SVTs back in the 70s, and I crave tube amp tone. In recent years the bass amps provided in a backline are nearly always solid state, so I have a pedal with a couple of presets. Bringing my own tone along makes it a lot easier to be consistent from one show to another if you don't know what you'll be playing through. The preamp pedal has a post-drive output to go straight to the PA; that's best when the amps vary from one show to the next. I'll set up one channel as my primary tone with whatever drive is appropriate for the project; this is the setting I'll use for 95% of the gig. A second stand-out channel gets more OD with a little tonal emphasis, but with the low end unaltered. And a third is clean for any passages that may need a gentler treatment.
Now, given a good tube amp I could do all that simply working the knobs on my bass. But I seldom have the luxury of specifying; most of the time it's solid state. So I always bring my drive pedal.