Not to mention aesthetic issues (many people think the old guitar looks cool) and familiarity with old guitars - every guitar is unique, and the person playing it is gradually drawn to them and even treated as family. There is another reason here: the instruments are like wine, the better the sound of the wood is. A guitar is old and technically just "different," but almost all the guitarists tell you it is "better."
Master (guitarist) Alan Carruth tells us that wood consists mainly of cellulose, lignin and hemicellulose, and that all the wood gradually loses hemicellulose, a soluble polysaccharide, Slow evaporation over a long period of time. Once the hemicellulose dissipates, the wood lightens, but still hard enough to support the chord weight. After the weight loss guitar vibration more freely, so the instrument sounds louder, and can make the frequency of previously obstructed resonance. In addition, the precipitation of sap crystals inside the wood over time also helps to increase the hardness of the wood.
Likewise, lignin degrades when spruce (the wood commonly used to make guitar tops) is exposed to the sun. It is worth mentioning that this usually gives the white wood a yellow or orange hue, and that will make people feel more beautiful. Of course, the degradation of lignin means that the physical structure of the wood has also changed, that is, degradation can contribute to the acoustic side effects of wood aging.
So can we do this step artificially?
Guitar manufacturers have long thought of this, in order to make their guitar looks much older than they are, they will sell that old-fashioned guitar, and eggs, in fact, it only affects the appearance of the guitar. Recently, the manufacturer started to roast the wood again. The wood used to make the guitar is usually piled to about 6-10% moisture. Often, this is enough, but some baked wood will continue to "cook" at higher temperatures and oxygen-controlled conditions until the wood is devoid of moisture. Then it can be taken out of the pit and re-placed in a humidity range of 3-6%. This is all about making dark, amber guitar wood that's lighter, harder and louder because the sap can crystallize better and the hemicellulose degrade even more by rapidly heating and evaporating the wood fast.
Whether aged or artificially aged, the age of the wood can affect the sound of the instrument, and most musicians agree that the louder the wood, the better the sound! But still do not expect the guitar in your hand to grow with age and improve somewhat