song was later included on the soundtrack to the 1970 film Performance; Rolling Stone included it at number 92 on its "100 Greatest Guitar Songs of All Time" list. In 1970, he recorded his own self titled debut album, which included the Blind Willie Johnson classic slide instrumental "Dark Was the Night, Cold Was the Ground" (re-recorded in 1984 for the soundtrack to Paris, Texas). Recognized as a master of slide guitar by 1967, Rolling Stone magazine ranked him at number eight on their list of the "100 Greatest Guitarists of All Time" in 2003. Duane Allman’s slide playing with the Allman Brothers Band was one of the formative influences in the creation of Southern rock. He also added memorable slide guitar to Derek and the Dominos’ Layla and Other Assorted Love Songs album, notably its title track, which was ranked at number 13 on Rolling Stone's "100 Greatest Guitar Songs". Allman, who died in a motorcycle accident at age 24, was hailed by NPR's Nick Morrison as "the most inventive slide guitarist of his era". He extended the role of the slide guitar by mimicking the harmonica effects of Sonny Boy Williamson II, most clearly in the Allman Brothers' rendition of Williamson's "One Way Out", recorded live at the Fillmore East and heard on their album Eat a Peach. Technique The slide guitar, according to music educator Keith Wyatt, can be thought of as a "one-finger fretless guitar". The placement of a slide on a string determines the pitch, functioning in the manner of a steel guitar. The slide is pressed lightly against the treble strings to avoid hitting against the frets. The frets are used here only as a visual reference, and playing without their pitch-constraint enables the smooth expressive glissandos that typify blues music. This playing technique creates a hybrid of the attributes of a steel guitar and a traditional guitar in that the player's remaining (non-slide) fingers and thumb still have access to the frets, and may be used for playing rhythmic accompaniment or reaching additional notes. The guitar itself may be tuned in the traditional tuning or an open tuning. Most early blues players used open tunings, but most modern slide players use both. The major limitation of open tuning is that usually only one chord or voicing is easily available and is dictated by how the guitar is originally tuned. Two-note intervals can be