I do remember my first kala elite concert. It did take some time. Then, boom- whoa -that sounds so cool, so much better than at first. I know what I heard at first, compared to later when "it", ... sang!Nope, they don't. After a period of time people either figure out how to make it sound good, or their ears simply get used to the sound. Probably a combination of both.
Based on my experience of a limited number of instruments I’d say that instruments do change over time and that opening up is a real event, or rather progression. (Edit. I have kept some notes and done comparison tests against reference instruments.) It takes time and use and can be a very slow process, sometimes the process is so slow that it appears to not have happened yet and/or not be in progress. What you’re left with after the opening up process is done is going to vary between instruments, the changes in the wood allow the Uke’s sound to improve but it will still be limited by the original design and build.Does a uke really "open up" ? I have some real different thoughts on this.
That is it. There are changes of a very new uke when glue, finish, and wood still settle in over time and also responses to temperature and humidity changes that are short term. In the longer term like many years or decades there is just plain aging that is usually detrimental like with people where after they reached their peak it just goes downhill. I own several high end vintage instruments and would not be able to say if they sound any worse or better than new ones, or for the ones that I have owned since new if they changed over years and decades.Nope, they don't. After a period of time people either figure out how to make it sound good, or their ears simply get used to the sound. Probably a combination of both.
I own a Gibson from the 1920s (an el cheapo when it was made) that has a completely different character from any of my modern instruments, including my Ken Timms. I understand the materials are different, who knows how it was handled over the years, etc. I’ll just say it sounds like a 1920s instrument is supposed to sound, and I’ve never played anything else like it.I will just say this, I don’t know any luthiers who deny that some instruments open up over time. We get to hear them when they are first strung up, 2 hours later, 4 hours, 12 hours and two days later. Believe me most instruments I build change quite a bit when they are first settling in. And I am not relying on memory here, as I have at least two dozen other instruments of varying ages to compare them to. One final thought, if you don’t think wood changes over time, I know a lot of people that are spending big bucks on torrified wood!