There are a lot of guitar makers incorporating the arm bevel feature into their builds. This has become an increasingly desirable appointment for artists who need more ergonomic instruments. Pressure points can sometimes develop on your arms and chest especially when you are really getting into a groovy jam. Sometimes the jam is so good you don’t notice until later you have developed an impression in your forearm or chest. It really depends upon your physical body type how the instrument sets against you while you play.
In this video, Anthony explains how we have accomplished some ergonomics into the lower bout of the harp guitar where your right arm crosses and rests against the edge of the instrument. Commonly builders reinforce the edge with hardwood blocking that allows for a large 45 degree chamfer that curves around the edge of the lower bout. While this significantly bevels the edge, it also reduces the size of the top resulting in less movement and potential loss of volume and tone.
Our solution incorporates a soft bevel feature that accentuates the existing radius of the top so some ergonomics are achieved for your right arm without shrinking the vibrating surface of the top. Anthony used a small hand planer to take the rim down smoothly around the lower bout which leaves a gap that the top can be flexed into creating an accentuated radius for your arm. No extra lining or blocking is needed and the top is already has a 20′ radius so not much extra tension is added to flex it into the gap.