"From Elvis in Nashville" includes 40 tracks from the sessions at RCA's studio B in June and September 1970 - presented here without the original overdubs to transport the listener as if they were in studio B - as well as rare and unreleased takes, all recently mixed by the famous sound engineer Matt Ross-Spang (John Prine, Jason Isbell). The "marathon" sessions that spanned five days (starting in the early evening and continuing until dawn) resulted in a wide variety of "country" tracks, ranging from bluegrass to honky-tonk, as well as more polished sounds, and even touches of the "outlaw" sound that would soon dominate the country charts. Highlights include a soulful version of Willie Nelson's "Funny How Time Slips Away," the moving "I’ve lost you," a powerful cover of Simon & Garfunkel's "Bridge Over Troubled Water," and a new version of "Love Letters" that Presley had already recorded in 1966. Following the Las Vegas concerts, the King briefly returned to studio B at the end of September. However, the sessions were not as fruitful as those in June, with the wild version of "Whole Lotta Shakin’ Goin’ On" being one of the highlights.