Nervosa is nervosa, regardless if it’s playback (USB, DAC, amp, headphone) or live including being a musician (can’t get more “live” than if you’re one of the people playing). Going to a live concert, one can worry about the “best” acoustic seat (is the $150 more expensive center orchestral seat worth it). Being a musician there’s endless potential nervosa regarding is this the best sounding instrument. Maybe the neck or bridge (or whatever) needs a little work. Did the luthier mix the glue right that day when binding the wood for you instrument, or some other obscure but nervosa inducing thing. While some nervosa is good (it can drive people to truely find better things) sometimes the best thing is to take a deep breath, keep everything in perspective (ones whole life, family, friends), and sit back and enjoy what one already has. Just my 2 cents.