Angelo Clematide (1954-2013) was a multifaceted Swiss musician, composer, arranger, producer, and entrepreneur. Known also by pseudonyms such as Rudolf von Hagenwil and A Einstein, Clematide was a prolific figure in the music industry, leaving a significant impact as a mentor and friend. He was deeply knowledgeable, often sharing his insights with a characteristic acerbic wit that was both helpful and challenging to his peers.

Clematide's work spanned various roles, including engineering and mixing, as seen in his contributions to albums such as "Feng Shui" by Michel Angelo and "Mystery Bay" by Mich Gerber. His music, including the album "A Touch of Love," is often categorized under the New Age genre. Additionally, Clematide was involved in international projects like the China Music Industry Park in Shanghai, collaborating with notable figures such as Bruce Swedien.

Residing in Switzerland, Clematide was an avid participant in music forums, where he engaged with other musicians and shared his passion for music, including his admiration for virtuosos like bass player Saturnino Celini and flamenco guitarist Gerardo Nunez. His sudden passing in July 2013 was a significant loss to the music community, where he was remembered as a husband, father, and a cherished colleague.