[1] Vocal compositions of the duo consists of loud and quiet sounds accompanied by a piano: church chants meet spirituals, combined with throat singing and avant-garde music.

[2] Duo Zikr is the duet of vocal improvisations of Igor Silin and Olga Tkachenko - the only Magic Theatre of Voice in the world whose art compels the audience to experience the whole range of human emotions.

One rare event when the soloists of the Magic Theatre of Voice sang concrete words instead of spontaneous syllables and sounds was the soundtrack to The Song about the Cheese Spirit, an animated cartoon by famous fable of Aesop "The Fox and the Crow".

Jim Bessman, special correspondent for Billboard magazine (NY, US) - "Apart from dynamic improvisations making the visitors experience unique feelings, there is one more thing about the Duo.

The sextet of male singers has been learning Duo Zikr's unique vocal technique ("Freevoice") and individually as well as jointly with the duet they have staged over 50 concerts in France, Czech Republic, Lithuania, Cyprus, Russian and Ukraine.