Organizers for this year’s Hardly Strictly Bluegrass festival are once again announcing the lineup of confirmed artists through a series of music medleys, the first of which was released over the weekend.

AUGUST 29 UPDATE: The fourth and final lineup medley is confirmed but Hardly Strictly Bluegrass Festival organizers promise “another big announcement coming soon.” Here’s the list of acts set to play, so far:

Fourth Medley:
1. Seldom Scene
2. Shovels and Rope
3. Emmylou Harris
4. Steve Earle & The Dukes
5. Buddy Miller & Jim Lauderdale
6. Jesse Dee
7. Jesse DeNatale
8. Martha Wainwright
9. Robert Ellis
10. The Warren Hood Band

Third Medley:
1. Joy Kills Sorrow
2. Sturgill Simpson
3. Conor Oberst
4. Allah-Las
5. Freakwater
6. Robert Earl Keen
7. The Handsome Family
8. The Time Jumpers featuring Brad Albin, Larry Franklin, Paul Franklin, Vince Gill, “Ranger Doug” Green, Andy Reiss, Dawn Sears, Kenny Sears, Joe Spivey, Jeff Taylor & Billy Thomas
9. Paul Kelly
10. Low

Second Medley:
1. Chris Isaak
2. Mark Lanegan
3. The Devil Makes Three
4. Boz Scaggs
5. Father John Misty
6. Calexico
7. Whispertown
8. Richard Thompson
9. Mike Scott & Steve Wickham (of The Waterboys)
10. First Aid Kit

First Medley:
1. LP
2. Bonnie Raitt
3. Pieta Brown
4. Patty Griffin
5. Bettye LaVette
6. Alison Brown
7. Della Mae
8. Sallie Ford & the Sound Outside
9. Nicki Bluhm & the Gramblers
10. Natalie Maines

AUGUST 5 POST: As acts are guessed correctly, they will post the confirmed artist names on the festival’s website. Below is the first 6-minute audio mashup with songs from 10 artists. Expect more of these sound clips to appear over the next few weeks. This Hardly Strictly Bluegrass arrives October 4-6 this year. The free festival regularly draws more than 500,000 people to Golden Gate Park.

The first clip appears to feature blues and R&B singer-songwriter and guitarist Bonnie Rait, folk singer Patty Griffin, former lead singer of the Dixie Chicks Natalie Maines, alt-country singer-songwriter Pieta Brown, soul vocalist Bettye Lavette, bajo player Alison Brown, progressive bluegrass band Della Mae, indie rock group Sallie Ford & the Sound Outside and Nicki Bluhm & the Gramblers.