Almost 20 years removed from their Central High School beginnings, the legendary St. Paul crew Heiruspecs stand as elder statesmen in an era when live instrumentation is having a moment in hip-hop. Just look at the musicianship of Donnie Trumpet & the Social Experiment (the band that counts Chance the Rapper as one of its members) or the jazz players who helped make Kendrick Lamar’s groundbreaking opus, 2015’s To Pimp a Butterfly. Then again, the Heiruspecs have always boldly bucked rap trends, constantly keeping an air of classiness and professionalism about them. After going six years between albums, they returned in 2014 with their sixth studio LP, Night Falls, which got the job done thanks to the densely constructed verses of Midway Felix and Muad’dib, as well as the band’s vibrant, immaculately recorded instrumentation, bolstered as always by Peter Leggett’s heavy drum parts. On Friday at Icehouse, the six-piece will celebrate their new five-song release, theskyisfalling. Twin Cities jazz/funk/soul band Ayvah opens.