from the band Hacienda and percussionist Patrick Hallahan from My Morning Jacket. The original percussionist, Bob Cesare, was unable to perform with the Fast Five because of a death in his family. Auerbach and fellow Black Keys member Patrick Carney met the members of Hacienda at a club, Emo's, in Austin, Texas while watching a band during the Austin City Limits Music Festival. Upon seeing one of the Hacienda band members hit on an intoxicated woman, Carney walked over and leaned in saying, "Dude, trust me, that's a bad idea." After becoming acquainted with each other, Auerbach e-mailed Hacienda a month later asking for more demos, which eventually led them to being asked to open for The Black Keys and Dr. Dog at a show in Austin, Texas. Afterward, Auerbach asked Hacienda to travel to Akron, Ohio where they would be his "guinea pigs" while recording Keep It Hid. Blakroc Blakroc was a studio album and collaboration by Auerbach and Carney of The Black Keys and Damon Dash, co-founder and former co-owner of Roc-A-Fella Records, who oversaw the project. The album featured a plethora of guest appearances from several indie and popular hip hop and R&B acts, namely Mos Def, Nicole Wray, Pharoahe Monch, Ludacris, Billy Danze of M.O.P., Q-Tip of A Tribe Called Quest, Jim Jones and NOE of ByrdGang, as well as Raekwon, RZA and the late Ol' Dirty Bastard of Wu-Tang Clan. The Arcs In 2015, Auerbach announced the formation of a new musical group known as The Arcs. Auerbach said about the band: "I just wanted to do my thing and get extra weird. I wanted everything to flow [and] be cohesive. It's basically everything I love about music all wrapped up into one record". The debut album, Yours, Dreamily, was released later in the summer of 2015. During the Bataclan Theatre massacre, Auerbach and his band The Arcs were performing at the similarly sized nearby venue Le Trianon. Auerbach subsequently stated, "I know people that were there last night. I know people who are like, ‘What am I gonna do – see the Arcs or the Eagles of Death Metal?' And I've woken up feeling very out of sorts. What do you call it, survivor's remorse? Why the hell did it happen there and not where we were playing? I'm just so brokenhearted about all those people." On July 3, 2018, Richard Swift, the multi-instrumentalist