Gillian Welch and her songwriting partner David Rawlings opened their set in the Gobi tent with a cover of Johnny Cash and June Carter’s “Jackson,” which was every bit as authentic and soulful as the original. As an ode to Gram Parsons they were decked out in Rhinestones a la the Flying Burrito Brothers — classic. The two are American treasures playing the native music of this country the right way. The Coachella crowd took well to it, and they should have — it was undeniable. Thus far my favorite performance of the day.