[quote name='warwickhunt' timestamp='1459424756' post='3016382']
You know that's an interesting point! I've swapped 'normal' strings on the bass and I can't for the life of me think that I've ever made note of differences in tone. I suppose in theory the sensor tracks the string movement and each type of string will have it's own inherent qualities so they will sound different but I would likewise think that old strings shouldn't sound different to new strings... if a buyer wants to play, I've a few sets of used but as new strings (inc flats), which you can experiment with.
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Out of my league, but I'm curious (and free bump!) - do rounds sound different to flats? I can see that they might, because the optical sensor might be sensitive enough to tell the difference.