http://www.nytimes.com/2010/04/05/technology/05tonerite.html https://www.tonerite.com
I've heard from several musicians that say that it genuinely works. I've also witnessed first hand the "breaking in" process with an instrument that results in a better sound after being played a lot. Note that an old instrument doesn't break in - it is the playing.
I've also heard, from Ed Maday - http://www.edmaday.com - that the vibrations are why he says away from power machinery in his craft - he believes that the use of that machinery might damage the potential tone of the wood. I am skeptical, but if there is a mechanical process involved, then maybe he's not wrong.
By comparison, I had a guitar teacher who would play his G&L Strat 5 days a week for lessons, and you could just see how he was working the fretboard and neck into the sweetest playing, conditioned piece of gear. He always had a line of people waiting to buy his guitar whenever he felt like he wanted a change. I can understand wanting a guitar that "broken in" but by comparison getting something artificially relic'd or aged doesn't seem appealing.
What is the nature of this "aged" quality that is desirable?
So what? He was talking about guitars made of wood, not speaker cables.
With a wooden beer cask I had (4.5gal) you could taste the vanilla from the wood, which I believe was so prominent because of the small cask size, because of more wood touching the beer.
I'm wondering if the cask size also effects the amount of angels share too.
I've just been skimming: http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.1995....
Although it says "An increased surface to volume ratio of the miniature cask, and increased oxygen concentration, appeared to enhance both extraction and further transformation of wood components, resulting in the dominance of a single characteristic, sweet, after 21 months of maturation." they go on to mention
"maturation of Scotch malt distillate in miniature casks did not enhance the sensory quality of the final product, nor did miniature casks provide a suitable model of an accelerated Scotch whisky maturation process."
I would link to a source, but they are all pretty much just advertisements. Your favorite search engine could find them.
http://www.fendercustomshop.com/series/artist/jaco-pastorius...
I'm guessing it won't make me play like Jaco. ;-)