Very often I've been asked what is the best exercise to improve speed? I've found that in 90% of the cases, the first thing to correct was the picking hand. Here is the basic idea that you will have to apply for your playing:
The fingers must be straight when they pull the strings, meaning that you should not bend the 1st or 2nd joint. It is better, for power and endurance purposes to use the larger muscles of the hand, rather than the smaller muscles of the fingers.
The numbers below the staff, represent the right hand fingers, number one being the index finger. You should rest on the pick-up, or if you have a 5 string bass, on the B string. This will help mute it. You have to pull on the string, don't try to hit it. The more you pull, the louder it will play. Just pull, don't pluck. For example, if you play the G string with your first finger, after pulling on the G string your finger should be resting on the D string.
Now if you play the G string again, you should use your 2nd finger. After playing, your 2nd finger will be resting on the D string and your 1st finger will be up in the air ready to play the G string again.
If you want to play the D string, you will then use your 2nd finger, which is already in position, resting on that string.
WHILE YOU DO THIS EXERCISE, TRY TO DO THE FOLLOWING:
Play the E string with your 1st finger, then, the A with your second finger. Your 2nd finger will be now resting on the E string, leave it there while you play the D string with your 1st finger. Your 2nd finger will be ready now to play the next E. Proceed now to play the A with your 1st finger, it will be now resting on the E string, leave it there, and play the D with your 2nd finger. You are now ready to start from the top again...etc..
ON THE NEXT ONE, LET'S JUMP OVER THE "D" (Audio Clip)