Italian and Portuguese musicians meet in the studio in Berlin for a set of studio free improvisations, from Creative Sources father/son collaborators Ernesto Rodrigues on viola and Guilherme Rodrigues on cello meeting trombonist Davide Piersanti and vocalist Ligia Liberatori for twelve exceptionally open, informed and unusual conversations.

Four strings, voice and trombone make up the multinational collective quintet of Davide Piersanti (trombone), Hui-Chun Lin (cello and voice), Sergio Andres Castrillon Arcila (cello), Ulf Mengersen (bass), and Klaus Kurvers (bass) who are captured live at "t-berlin" in 2016 for a set of inventive and active cooperative conversations named for Greek letters.

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