Rodrigo y Gabriela tore it up on Letterman last night with a performance of their hit single “The Soundmaker” off of their latest album, 9 Dead Alive.

Check out the epic performance below, and make sure to watch through to the end. In Letterman’s own words, “Oh … my god. Whoa. My fingers are bleeding! Honest to god – that’s unbelievable.” We can’t make this up, folks.

If you just can’t get enough of Rodrigo y Gabriela’s furious , check them out on tour now through the end of October – new dates have been added! Dates are below:

JULY

31 – Vienna, VA-Filene Center At Wolf Trap w/ Kishi Bashi (solo)

AUGUST

02 – Bridgeport, CT-Gathering of the Vibes Festival

05 – Wilmington, NC-Greenfield Lake Amphiteater w/ Milow

06 – Charlotte, NC-The Fillmore Charlotte w/ Milow

08 – Nashville, TN-Ryman Auditorium w/ Milow

09 – Atlanta, GA-Chastain Park Amphitheatre w/ Quiet Hounds

10 – Louisville, KY-Iroquois amphitheater w/ Heather Maloney

13 – Grand Rapids, MI-Meijer Gardens w/ Heather Maloney

14 – Milwaukee, WI-Riverside Theater w/ Heather Maloney

15 – Minneapolis, MN-State Theatre w/ Zach Heckendorf

17 – Morrison, CO-Red Rocks Amphitheatre w/ Nathaniel Rateliff

OCTOBER

08 – Miami, FL-The Fillmore Miami Beach

09 – Clearwater, FL-Ruth Eckerd Hall

11 – Charleston, SC-Southern Ground Music & Food Festival

12 – Birmingham, AL-Iron City

15 – Houston, TX-Bayou Music Center

16 – Austin, TX-Moody Theater at ACL Live

18 – Grand Prairie, TX-Verizon Wireless Theatre

21 – Indianapolis, IN-Egyptian Room at Old National Centre

22 – Madison, WI-Orpheum Theatre

24 – Chicago, IL-Chicago Theatre

25 – Detroit, MI-The Fillmore Detroit

27 – Burlington, VT-Flynn Center for the Performing Arts

28 – Northampton, MA-Calvin Theatre

29 – Boston, MA-Orpheum Theatre