what gauge strings john mayer?
Blues-rock
neutral
 = = = Gauges = = = 

neutral
 = = = = = Guitars with seven and eight strings = = = = = 

contradiction
 Instruments and programming – Dr. Luke 

contradiction
 Reginald Kilbey , Allen Ford , Peter Halling – cellos 

contradiction
 = = = Related types of music = = = 
