I’m a musician too, and: yep, same. Many of my best songs occurred to me at work, or doing something else, and I grab a napkin or piece of paper and write down

I’m a musician too, and: yep, same. Many of my best songs occurred to me at work, or doing something else, and I grab a napkin or piece of paper and write down the chords and a melody and a few notes so that I can recall the idea later. But I don’t need an instrument in my hands to do this.