Hundreds of hours of difficult listening have led me to conclude that duo sessions are my favorite category of recordings by the ridiculously prolific members of the Extemporaneous Music and Arts Society. Coaxial, a new album by saxophonist Kyle Hutchins and guitarist/electronics manipulator Seth Andrew Davis, is no exception. The reduced number of sonic salvos and relative brevity of its eight tracks makes Coaxial the new music equivalent of a crossover pop album. Davis, a founder of EMAS, toys with severe noise and echoes Jimi Hendrix when he isn’t playing guitar in the percussive style of Joe Morris. Hutchins builds on the lineage of saxophone innovators including Pharoah Sanders, Evan Parker and Roscoe Mitchell. In Coaxial, Kansas City has produced another free jazz hit.