Stare Dobre Małżeństwo (or just SDM) is a Polish group, which performs in a style of music called "sung poetry" which can be described as mix of mostly acoustic, melodic folk music and poetic lyrics. Almost all of their songs were composed by the lead singer, Krzysztof Myszkowski and use poems by Polish poets Edward Stachura, Adam Ziemianin or Jan Rybowicz as lyrics. Sung poetry is strongly related to folk music and uses mostly acoustic guitars, violin and vocal harmonies to create instantly melodic musical landscape.