Inca Roads Frank Zappa Frank Zappa & the Mothers of Invention One Size Fits All (1975) quartal scale {sot --15---14---12---10---8-7--------------||-------------------------------| --15---13---12---10---8-7-10---8-------||-------------------------------| --14---12---11---9----7-5-9----7-------||-------------------------------| --14---12---10---9----7-5-9----7-------||-------------------------------| --------------------------9----7-------||-------------------------------| ----------------- (guitaretab.com)