https://www.musical-u.com/learn/musicality-means-tuning-your-instrument-by-ear/
If you play an instrument which needs to be tuned up before you play: Are you able to do it yourself by ear – or do you rely on an electronic tuner?
If you rely on a tuner then when you see someone tune up entirely by ear, it probably seems like they’re impressively musical.
Being able to tune your instrument is an important skill and one which is associated with musicality. In fact it is a learnable skill and one which will actually benefit you in a number of ways.