Motivation can come from many directions. But sometimes one is not motivated.Emotions creep in. I often say I never get bored only unmotivated. So we learn to suck it up and do the task at hand because we know it has to get done. I have learned that when I do one thing it can motivate me to do another and soon I am being productive. Nice music example you provided. As a life long musician I can relate. Thanks @tarazkp