Let's hear it Harzuf! This is all stuff I've been wondering as well. Is there a good eq pedal that does the job when eqing bass around the areas you mentioned?
My rig is a Roland GR-55, it's got a fully parametric EQ inside.
I'm supper anal about the Q as well, and will design an onboard circuit with more accurate behaviour for live sound for my bass.
However, the generic pedals should work fine, although I'm not experienced with them. the 60-120-400-500-800-4.5-10 seven-band Boss is close enough to these frequencies.
ok,
compressors. Use the followong method if you need more sustain (playing long notes).
1.Set
ratio = inf and crush the signal considerably and non musically with the
threshold as you play
normaly on the lowest string. the lowest string triggers the compressor most because of the energy it contains. I like fret 7-12, it's fullest sounding.
now set the
Attack time and you're listening now only for
punch length. Your sound is crap now, I know, it's just an extreme check.
2.As you play
softly, raise the
threshold until you get almost no compression.
3.As you play
normally again, set the
ratio until you get about 7dB of compression. If you bass and strings sustains well you might need less. You can think of this dB rating as "how many dB will be added to my sustain by the end of a long note". Sort off. Overdoing it kills the sound, be careful and use you ears. If it's slightly over-compressed, try it with the band anyway, it might not be noticable as an artifact in the general mix, but you will gain the desired sustain.
4.Play somewhere on the E string, one
sustaining note every 2 seconds. Now set the
release time so you hear a nice, constant sustain.
You're good to go now, playing with the others will tell you how to fine tune.
I guess nobody is anal as I am, but I also have a filtered compression procedure that results in evenly compressed strings, possible only on digital desks (or complex setup for a normal bassis), so I'll spare you the details :-D
If your playing needs some leveling, lesser gain reduction should be used, perhaps shorter attack time, higher threshold. Hard to predict, but once you master the controls you start to have a feeling for this.
If chaining a compressor and graphic equalizer pedals, I advice to have the compressor first on the chain for a start. Otherwise, EQ changes will affect how it reacts.. Although this might be desirable for a more advanced user who knows what he's doing and his rig.