This popular slow blues backing performance track,is perfect for practice or performance. 　　 Unlike most other jam tracks that are available in only a few keys, ours are arranged in all 12 for your playing versatility. 　　many of the backing tracks that are availible today are entirely midi..sounding somewhat robotik or fake. 　　 These were recorded by all live studio musicians to give you a more natural playing experiance. 　　 great for music schools, teachers or anyone seeking 　　the full accompanyment of a live band.