Calisthenics is the first album by Institute for Certified Nomadic Illicit Sonic Practices (ICNISP), the Berlin-based duo of Brazilian musicians Marina Cyrino (flute) and Matthias Koole (el.guitar). With a mixture of electronic and acoustic sound sources, objects and preparations, inside amplification and no-input mixing, the duo leads guitar and flute towards a common hybrid terrain. Sound perspectives are shifted, instrumental identities are displaced. The piccolo can function as a noise generator and a percussion instrument, the guitar can sound like a bird, the alto flute can be played by an external balloon that moans. Partly inspired by drawings of the Handbook of Calisthenics and Gymnastics: A Complete Drill- book with Music to Accompany the Exercises by J. Watson, first published in 1864, ICNISP came up with a series of musical exercises to stay healthy and fit during the several lockdowns over the past few years. In a playful way, the title Calisthenics also translates an agitation present in many of the duo's energetic playing modes. On Side A, Calisthenics comprises 7 tracks - or exercises - of different lengths, with a focus on specific instrumental materials or preparations. Side B consists of one track in which a larger form unfurls, with elements of the exercises concatenated into a Full Arch.