Watch the One Way Out: Ex. 4b online guitar lesson by Andy Aledort from Kings of Rock & Roll Vol. 3: Duane Allman
This excerpt represents the last 12 bars of a 24-bar blues form, starting from the IV (four) chord, D, and carrying through the rest of the solo chorus. This entire solo segment is played between 15th and 17th position, and the scale formed when playing slide in this way is a hybrid scale, with elements of both the A major and A minor pentatonic scales; the resulting scale is (descending) A G E D C# B A.