What distinguishes historical instruments from current instruments? Should the repertoire playing on historical instruments be limited to the works that were created at the time, and to the composers who lived at the time when these instruments existed? The 'New Music for Old Instruments' project addresses this gap, demonstrating how we can deconstruct and reinvent common notions about the historical and organological limitations of some instruments. Borealis Ensemble is formed by António Carrilho (recorders) and Helena Marinho (pianoforte). They released two CDs with the support of the University of Aveiro. The CDs propose a dialogue between apparently disparate repertoires, from different periods.