Tuned guitars sound so much better than ones out of tune.

Every guitar has to be routinely tuned. It isn’t the default setting for a guitar to stay tuned. You have to make slight turns to the strings as you play.

The more you play, the more you tune.

Musicians are always making slight adjustments again and again and again. You’re not surprised or caught of guard by this. It is expected.

Choose your metaphor here.