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CATHEDRAL ECHO is Eleutherios Tsourapis' personal audiovisual project. He started releasing music under that name in 2018 with the release of his first EP ΨΧ after experimenting with different genres and fusing his influences into an ever-forming amalgam of sounds and textures using both analog and digital sonic and optical media. On May 30, 2023 his first full-length album Cosmos Gemini was released.