"Codex Rost 1660" is an audio CD by the ensemble Open Chamber Berlin, released by the label Querstand. The album is built around the historic Rost codex from 1660, a manuscript that preserves compositions from the 17th century and offers a fascinating insight into the musical language of that era. Open Chamber Berlin approaches this repertoire with a focus on clarity of structure, transparent ensemble sound and a vivid sense of musical rhetoric, bringing the notated music to life with refined articulation and nuanced phrasing. Listeners can expect a carefully curated sequence of works that balances contemplative, inward-looking pieces with more extrovert, virtuosic movements, always with an ear for stylistic authenticity and emotional immediacy rather than mere historical reconstruction. The recording quality of this CD supports the ensemble's detailed dynamic work and finely tuned interplay, making it equally suitable for focused, analytical listening and for an immersive, atmospheric experience. Querstand is a specialist classical music label known for high-quality productions, a strong focus on carefully chosen repertoire and close collaboration with dedicated artists and ensembles. Instead of chasing mass-market trends, Querstand typically highlights projects that deepen the listener's understanding of specific epochs, composers or sources, and places great emphasis on natural, transparent sound engineering and thoughtfully designed booklets. With "Codex Rost 1660", Querstand once again underscores its commitment to repertoire that lies somewhat off the beaten path yet has a great deal to say to contemporary audiences. Open Chamber Berlin is a flexible chamber ensemble devoted primarily to classical and early music in historically informed performance. The musicians are experienced chamber players who place particular value on stylistic awareness, precise ensemble work and a communicative, direct performance style that bridges the gap between score and listener. In their projects they often explore lesser-known works and sources, juxtaposing them with more familiar repertoire to shed new light on musical contexts and traditions. With releases such as "Codex Rost 1660", the ensemble has established itself as an interpreter able to combine scholarly curiosity with vivid, engaging performance, helping to bring rarely heard music to a broader listening public.