| As many have said, there is no disadvantage and every advantage to learning how to sightread for bass, and reading music in general. However, in most playing situations you will not have sheet music in front of you. You may have a lead sheet showing the chords, a jazz chord chart (similar, but with the chords listed over the rhythm of the changes), or no music at all. Therefore, only being able to play when you've got sheet music in front of you (or have memorized the sheet music) is a liability.
In those cases, you will need to be able to construct a bass line. It could be as simple as pumping the root of a I-IV-V-type progression or as complex as a walking line with skips and ghosts weaving through jazz chords. That requires a solid grounding in chord theory, and a good ear for chords. Being able to read music will help in learning these skills, but it requires far more than seeing a note on the staff and playing it, and can be learned with very little sightreading skills (you've heard of "playing by ear" on just about any instrument; it really can be done well and the ability is a strength, not a weakness). |