Guitar It is flat on classical guitars and slightly curved crosswise on acoustic and electric guitars. The curvature of the fretboard is measured by the fretboard radius, which is the radius of a hypothetical circle of which the fretboard's surface constitutes a segment. The smaller the fretboard radius, the more noticeably curved the fretboard is. Most modern guitars feature a 12" neck radius, while older guitars from the 1960s and 1970s usually feature a 6-8" neck radius. Pinching a string against a fret on fretboard effectively shortens the vibrating length of the string, producing a higher pitch. Fretboards are most commonly
Banjo guitar keys, but also only five strings the short fifth string going up a hole at the 5th fret up a channel under the fingerboard, an through a hole in the headstock to a tuning roller. Banjo guitar Banjo guitar or Banjitar is a six-string banjo tuned in the standard tuning of a six-string guitar (E2-A2-D3-G3-B3-E4) from lowest to highest strings.. The six-string banjo was introduced in the late 19th century. Less widespread than four- and five-string banjos, it was reintroduced in the latter part of the twentieth century with the modern guitar-like tuning. The six-string "banjo guitar" should not be