What is "in step"

a. 1 Of a number of people walking, or especially marching, synchronously, so that that footfalls occur at the same time. 2 (context figuratively English) Of two or more people agreeing, or following the same policy or procedure.

In Step is the fourth studio album by Stevie Ray Vaughan and Double Trouble released in 1989. The title In Step can be seen as referring to Vaughan's new-found sobriety, following the years of drug and alcohol use that eventually led Vaughan into rehabilitation. It was also Vaughan's final album with Double Trouble. In 1990, he recorded a collaboration album with his brother, Jimmie Vaughan, called Family Style; later that year, Stevie Ray Vaughan died in a helicopter crash.