Fall Out Boy have revealed, in an interview with Rolling Stone, that their recording session last week with Ryan Adams, at his own PAX-AM studio, yielded "'eight or nine' songs over two marathon nights."

We first brought you news that the group were back in the studio last Wednesday, along with this photo, posted by the band with the caption "back to work pax am:"

As we previously pointed out, Adams is a friend and collaborator of Butch Walker, who produced FOB's recent Save Rock And RollRolling Stone has confirmed that Walker did, in fact, facilitate the band's association with Adams.

According to Wentz, the session was "punk rock – the stuff that makes you want to kick the shit out of your bedroom at your parents' house," and working with Adams "was like hanging out with your older brother that got you into punk rock." Though their time in the studio was described as very informal, Wentz did single out a particular track, "Keeping Up Disappearances," as a favorite, and has this to say about the possibility of release:

"I would hope that somewhere in some universe you could put out a seven-inch and kids still care. I think that there's a formula for something like that to happen with Fall Out Boy. I think there's a side of our band in our fans that would appreciate some of the noise that Ryan comes up with, and it would be great for the fans to be able to hear that – hear sort of the raw energy that happens from sessions like that."

You can read Rolling Stone's entire article here, and you can catch Fall Out Boy this Thursday night on Late Night With Jimmy Fallon, Friday morning on TODAY, and on tour in Europe and Asia, followed by a North American arena tour with Panic! A The Disco and twenty | one | pilots, beginning next week. Here's a full list of dates:

July 25 - Ahoi Rock Festival - Munich, DE

July 26 - Greenville Music Festiva - Berlin, DE

July 27 - Omas Teich Festival - Grossenfehn, DE

July 28 - Stadtpark - Hamburg, DE

July 30 - A2 - St Petersburg, RU

July 31 - Stadium Live - Moscow, RU

Aug 4 - Pentaport Rock Festival - Incheon, South Korea

Aug 6 - Fort Canning Park - Singapore

Aug 8 - SMART Araneta Coliseum - Manila, Philippines

Aug 10 - Summer Sonic 2013 - Tokyo, JP

Aug 11 - Summer Sonic 2013 - Osaka, JP

Aug 15 - Pukkelpop - Hasselt, Belgium

Aug 16 - Frequency Festival - St. Polten, Austria

Aug 18 - Lowlands Festival - Biddinghuizen, NL

Aug 19 - STRAND - Nagyon Zene Fesztival - Zamárdi, Hungary

Aug 20 - L’Olympia Bruno Coquatrix - Paris, FR

Aug 23 - Leeds Festival - Leeds, UK

Aug 25 - Reading Festival - Reading, UK

Sept 5 - Mohegan Sun - Uncasville, CT

Sept 6 - Tsongas Arena - Lowell, MA

Sept 7 - Barclays Center - Brooklyn, NY

Sept 8 - Liacouras Center - Philadelphia, PA

Sept 10 - Patriot Center - Fairfax, VA

Sept 11 - Wolstein Center - Cleveland, OH

Sept 14 - Palace of Auburn Hills - Auburn Hills, MI

Sept 15 - Echo Beach at Molson Canadian Amphitheatre - Toronto, ON

Sept 18 - First Bank Center - Broomfield, CO

Sept 20 - Honda Center - Anaheim, CA

Sept 21 - America's Cup Pavilion - San Francisco, CA

Sept 22 - Valley View Casino Center - San Diego, CA

Sept 25 - Cynthia Woods Mitchell Pavilion - The Woodlands, TX

Sept 26 - Verizon Theatre at Grand Prairie - Grand Prairie, TX

Sept 27 - Mud Island Amphitheater - Memphis, TN

Sept 28 - Verizon Wireless Amphitheatre at Encore - Alpharetta, GA

Sept 29 - USF Sun Dome - Tampa, FL