The Main Jazz Valve is an energetic project combining seemingly inaccessible variations of jazz currents with the ubiquitous pop music. Polish hits known from radio stations are presented in swing arrangements, taking the listener on a journey through the smoky clubs of the 30s, 40s and 50s. A nine-member composition from Poznań breaks the interspecies barriers in the works of stars such as Monika Brodka, Margaret or Perfect and many, many others. The recipient is served an extraordinary mixture flowing in full sound directly through the Main Jazz Valve.