Big Truck by coal chamber Rayna tunes her bass down two and a half steps. The tuning is as followed (B, E, A, D) If you have a 4 string I sugjest buying fatter strings so its easier to tune that low. She also uses a hipshot that shoots the B down to an A at times but its just for playing live. Main Riff: D |---------------------------||---------------------------| A |---------------------------||---------------------------| E |---------------------------||---------------------------| B |-55-556--55-565-55--6--||-55-556-55-55-66-------| D |-----------------------------| A |-----------------------------| E |------------------------------| B |-3-xxx-3-xx-3-xxx-3-1-----:| Bass Solo Part: D |---------------------------| A |---------------------------| E |---------------------------| B |-55-556--55-565-55--6--| Chorus: D |----------------------| A |----------------------| E |----------------------| B |-00-0-0-00-0-0-----:|