This album allows us to appreciate the versatility of the young performer Anna Urpina, whose goal has been to approach each score from a historically informed perspective. The compositions of c. XVII and XVIII (Castello, Biber, Corelli and Telemann) are recorded with Baroque violin (with gut strings) and bow next to the harpsichord. In addition, the tuning is half a tone lower (415 Hz) than is usually used in the current repertoire (442 Hz). Period techniques have also been put into practice, as well as Baroque flexibility in ornamentation and improvisation. Summoning a single key instrument to give life to the basso continuo allows us to compare in a more direct way the works belonging to the two historical periods, since the scores of c. XX and XXI (Webern, Pärt, José Luis Turina and Guix) are performed with modern violin and piano. In fact, following this idea of highlighting to the maximum the contrasts and constants that relate the eight compositions, the pieces have been ordered by combining one of each period instead of following a chronological order, thus generating quite a stimulating hybrid narration. An original proposal which highlights the sophisticated sound and artistic potential of the "four-chord lyre", as Biber used to call the violin.