The instruments below carry most of a country arrangement, and each one is there to do a job the others are not doing at the same moment. That division of labour is what the parts engine shows as computed cells; this page is the reference material for actually playing each chair — every chord, every scale, a key read by its diatonic chords, and for every chair on strings a map of the whole neck.
None of these is ours. Every one of them has a deep home elsewhere in the Warrior Network — the site that covers its whole family, its alternate tunings, its technique and its gear — and every page below doors out of here: to that home once it is open, and, for every chair on strings, to the same page on String Warrior, the network's hub, as well. What you get here instead is the arrangement reading: the same chord, framed by the part this chair plays once the song is actually running.
The banjo, and the job it does
Not every country record carries a banjo, and on the ones that do it is rarely the loudest thing in the mix. Its job is the roll: thumb, index and middle picking through the chord one string at a time, a steady stream of single notes that fills the eighths a two-feel leaves empty, so a song keeps moving forward while the guitar is only strumming on the beat. When the groove is already full — a train beat, with bass and guitar on every eighth — the banjo stops rolling and vamps instead, a closed shape pinched and damped on the backbeat, the same job the mandolin's chop does. The chair here is the five-string: tuned to an open G chord, with a short fifth string that drones a high G, which is why so many of its shapes ring open in the keys country singers reach for first. The tenor and plectrum four-strings belong to other music. The banjo's whole family — its tunings, its right-hand technique, its capo and its gear — lives on Banjo Warrior, and every banjo page here links there; what this site adds is where the roll sits against the other chairs, groove by groove, on the parts engine.