Every Tuesday Single Minded highlights new tracks hitting stores (or the Web) this week. On Fridays, come back for rarities, remixes, mash-ups and more.

Emmylou Harris, “Hold On” [MySpace]
No flashing lights, no pop crossovers, just Emmylou doing what she does best: curling her smoky alto around dry chords and singing of sorrow and longing.

Lil Wayne, “A Milli” [MySpace]
The gauntlet has been thrown, Axl! After months of rescheduling, re-recording and about 750 different mixtapes named “The Leak” or “The Drought,” the year’s most anticipated hip-hop album is upon us. Meaning for that the next six months, indie rock bloggers are going to have nothing to write about.

Martha Wainwright, “Comin Tonight” [MySpace]
Is it just us, or does this family kind of remind you of the Tenenbaums? Or the Glass family in those Salinger books? Does the Wainwright’s pet terrier have a record coming out? Did they record it with Van Dyke Parks? This scorcher from sister Martha proves her worthy of her family’s heavy mantle.

Flying Lotus, “Roberta Flack ft. Dolly” [MySpace]
Now this is more like it: anyone who wishes the new Portishead sounded more like old Portishead should be mailing Flying Lotus $15 before they finish this sentence. Dark beats and druggy vocals — simply sublime.

My Morning Jacket, “Touch Me I’m Going to Scream” [MySpace]
All good beardos unite: MMJ broker a treaty between Radiohead and the Band on their latest. “I know it sounds confusing, but it makes a lot of sense,” Jim James sings on this one. You’re telling us.

[Photo: Getty]