The Baltimore-based new-music duo Hybrid Groove Project may be relatively new to the scene, but they're poised to stir up some major-league, headline-grabbing, Daniel J. Wakin trouble with their explosive summer jam, "HGP Anthem." Emulating epic hip-hop feuds on the order of Jay-Z vs. Nas, Tupac vs. Biggie, and Wagner vs. Brahms, HGP is calling out and taking down rivals such as the International Contemporary Ensemble (ICE), So Percussion, MTT, Bang on a Can, Alarm Will Sound, Eighth Blackbird, Levine and the BSO, Boston Modern Orchestra Project, and Kronos, among others. Wisely, they don't mess with Esa-Pekka. You may have to listen several times to catch all the in-jokes. I especially like the chorus.