Watch the SECTION 4: Open A Tuning online guitar lesson by Andy Aledort from Slide Guitar Power

Open A tuning is the other essential slide guitar tuning along with open E/open D. Also, akin to the open E/open D relationship, the structure of the open A tuning is replicated in the also much used open G tuning, which is the same as open A but all of the strings are tuned one whole step lower. Thusly, all of the scale patterns for soloing and all of the chord shapes for both tunings are the same. You will hear open A tuning in use in many of the recordings by John Lee Hooker, Muddy Waters, Johnny Winter and Robert Johnson.