I remember the first time I heard Mavis Staples. The perfect voice in my opinion. Here's a take, via lap steel, of the title track off her 2010 collaboration with Jeff Tweedy, "You Are Not Alone."
Really nice sound. Can you fill us in on equipment and settings? (Guitar, slide, amp, etc.) I play acoustic and know nothing about the equipment,, but love the deep, rich sound you're getting and I'd like to look into a setup like yours.