Classical soprano and piano duo consists of two young, skilled musicians, soprano Olga Zinovieva and pianist Sergey Smirnov. This creative union was formed in the beginning 2006, when both of the successful solo performers started to work on an interesting project organized by the Royal Conservatory of the Hague and Dmitri Ferschtman: “Seven Songs based on poems of Alexander Block” by D. Shostakovich. This vocal cycle has been performed together with other musicians during a tour of the Netherlands. Concerts took place in Leiden, Utrecht (Vredenburg), and in the Hague's two largest concert halls with great success. In addition, the concert in the Hague's Dr. Anton Philips Hall was broadcast on Radio West, and a concert in Arnold Schönberg Hall was recorded for CD. It also marked the beginning of a joint collaboration between Olga and Sergey.

During 2006-2007 they worked on creating new concert programs including Italian, French, German and Russian chamber and opera music. Duo participated in such music festivals as “Grachtenfestival”, “Uitmarkt” (Amsterdam), “Festival Classique” (The Hague) and “Operadagen” (Rotterdam), performed on numerous concert podiums including Concertgebouw, Muziekgebouw (Amsterdam) and Oude Zaal (Tweede Kamer der Staten Generaal/House of Representatives, The Hague). Moreover, Olga & Sergey took part in masterclasses given by Rudolf Jansen, Charlotte Margiono and Kelvin Groute. In July 2007 SO-DUO recorded their first CD of songs by Rachmaninov.