Our columnist’s collection of moon spruce, ready for inspection—with a view.
As players get older, our instrument needs change. Our columnist shares how he designed an acoustic adapted to arthritis.
For many acoustic guitarists, playing the instrument is one of life’s greatest joys. As a luthier, I’ve seen firsthand how deeply musicians cherish their guitars, something they look forward to playing not just weekly, but daily. As any guitarist knows, some guitars simply feel different. While some are more rigid and require extra effort to play, others feel smooth and effortless. With this in mind, as our playing needs evolve, so too may the instruments we choose to accompany us.
My clientele is diverse, ranging from musicians in their 20s to those well into their 70s and 80s. One common challenge I have observed is that as players reach their 50s, many begin experiencing arthritis, which can hinder their ability to play comfortably. There are several techniques luthiers use to improve playability, such as lowering the action or opting for a shorter scale length; for instance, switching from a Martin 25.4" scale to a Gibson 24.750" scale. But, over the years, I began considering whether it would be possible to design a guitar specifically for players with arthritis, allowing them to continue playing with less strain on their hands, shoulders, and overall body.
My guitars are already designed to be exceptionally easy to play. They are not built for aggressive strumming or rugged outdoor use, though I can accommodate various styles. Recently, I took this concept a step further for a customer, creating an instrument with a smaller neck. Moving away from the traditional 1.750" nut width, I refined it to a slender 1.675". The string spacing at the bridge was adjusted to 2 3/16" instead of the wider 2 1/4" spacing used primarily for fingerstyle playing. Additionally, I incorporated a 25" scale length for a lower string tension at full pitch.
Combined with a 13-frets-to-the-body design, these adjustments made the guitar feel significantly smaller and more comfortable in the player’s hands. To enhance comfort further, I used an orchestra-class instrument, and added both an arm and belly bevel, reducing strain on the player’s shoulders. Even though I chose an OM for this build, an auditorium-class design would work well, too.
However, the most crucial aspect of this instrument was the top, which serves as its engine. I selected a piece of moon spruce, personally sourced in Switzerland in August of last year. This type of spruce is lightweight and highly responsive. More importantly, when voiced and tuned correctly, it requires minimal effort to produce sound and it has a higher level of admittance.
“Any movement on the strings, whether by the picking hand or the fretting hand, requires significantly less effort than on a traditional guitar.”
Admittance is a crucial factor when evaluating any musical instrument, whether one you are building or considering for purchase. In guitars and tonewoods, admittance is the amount of sound that can be produced with a standard level of effort. If a piece of wood has a high level of damping, it will not produce sound efficiently when built into a guitar, resulting in an instrument that is less enjoyable to play. Conversely, if the wood exhibits an extremely low level of damping, the guitar may feel responsive and lively, but this does not necessarily indicate a well-balanced instrument. Damping must be carefully controlled, particularly in the soundboard, to achieve an ideal balance. A properly voiced guitar should provide excellent responsiveness, a full and resonant sound, and treble frequencies that are rich and warm rather than thin or overly sharp. Thus, when discussing these aspects of guitar construction and tonewood selection, the key term to remember is admittance. For this build I was looking for high admittance while retaining a deep, well-balanced tone.
For the player, this means that even with standard tuning at A440 and regardless of whether they choose light or medium strings, though light gauge is preferable, the guitar remains incredibly soft to play. Any movement on the strings, whether by the picking hand or the fretting hand, requires significantly less effort than on a traditional guitar. This is due to the top’s high flexibility and responsiveness, allowing for a soft touch while maintaining a respectable level of volume.
For those dealing with arthritis or other hand-related challenges, selecting a softer-playing guitar is essential. Shorter scale lengths can be beneficial, but having an instrument custom-built by a luthier who understands these considerations can make a significant difference. For my customers facing these issues, my goal is to ensure they can continue playing for as long as possible. I recognize how important the guitar is to their lives, and I want to help them keep playing without unnecessary discomfort. If you are experiencing difficulties, there are options available, and solutions worth exploring.
