Ignoring that fact that that was part of an argument of the way the Music class was organized [i]then[/i] that never got resolved the double bass and the violin are not as linked as you seem to believe. With a bit of effort and work a violinist could transition to a cello but the double bass is completely different. The bass has much lower strings which are tuned in fourths instead of fifths like the violin, viola, and cello. It's like trying to add two fractions with different denominators, it does not compute properly without some major modifications. The double bass isn't actually part of the violin family. The double bass is the last remaining members of another family of instruments from several hundred years ago. They have similar designs and the double bass is often mistaken as part of the violin family but there designs and styles are radically different. Not to mention that the double bass serves a completely different function in music compared to a violin. Violin's play ahead of the beat, while the double bass plays behind the beat, it's an altogether different play style. Look transitioning someone from the violin to the double bass is not as easy as one might assume just by looking at the two instruments. It's like teaching someone who drives an automatic car to use a stick shift. You might as well teach her a completely different instrument cause she would have to learn a completely different set of rules and habits if she was to take up the double bass. Oh and as a bonus the standard form of playing the Double Bass for Jazz Band is called pizzicato which involves plucking the strings of the instrument with your fingers rather than using a bow, another thing that Sapphire has no training in.

And this isn't about my character but you can't make a distinction  between Choir and Concert Band when looking at your students when your class is titled 'Music' and there was no indication to the students that it was a band class at all.