Here is a practice track for bass players. It is in the key of G minor, at a medium tempo. There is only one chord – a G minor played throughout, but interest is created by interspersing rhythm accompaniments and lead tracks using various guitar sounds and organ styles. This track is ideal for sharpening up the G minor pentatonic chops. The minor pentatonic scale is great for all kinds of groove based music, and is also useful for rock and blues as well. There is no bass line recorded on this track, so see if you can play along, and create some bass lines using the G minor Pentatonic scale. A good rule of thumb to start with is to play the root note on beat one of each bar. Have fun exploring!
If you are not familiar with the G minor pentatonic scale, here is a fret board diagram. It shows two scale shapes that you can play with just fingers 1 and 3, which is easiest for less experienced players. In each case, start with your third finger on a G, and use your first finger to slide between fret one and fret 3 on the A string, or fret 8 and 10 on the D string.