When guitarists give any thought at all to their frets, it’s usually in the context of playability. Most often, we tend to only notice them when they’re getting too low to provide an adequate “grip,” or developing divots and ridges and are in need of a stoning and crown job at the very least. Poor frets will certainly affect your tone in the broad sense, in that the better you play—with all critical components in good condition—the better you sound. Frets, however, are also a tonal component purely in terms of their contribution to the makeup of any guitar, and frets of different types, and in different states of wear, will affect the sound that a guitar produces.