Ladi Geisler

Miloslav Ladislav Ladi Geisler was a German musician who established a high profile in the postwar German music scene. Best known for his work with pop musicians Bert Kaempfert, James Last and Freddy Quinn, Geisler developed the distinctive KnackBass percussive bass sound that helped popularize the Bert Kaempfert Orchestra. He later released numerous records under his own name.

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Source: Wikipedia