Hasle Rüegsau, formerly known as Graf Olaf, was born in the Swiss-Italian Alps and grew up in Zurich. He discovered his passion for electronic music in 1996 at the age of 15 and bought his first pair of Technics turntables in 1998.

His style is characterized by funky grooves, rolling beats, deep basslines, colorful melodies, and hypnotic harmonies. Inspired by his Turkish roots, his sets often include oriental rhythms.

Over the years, Hasle has become a well-known name in some of Zurich’s finest underground clubs. For several years, he also produced his own tracks and released them on labels such as Frieda Musik. Many productions remain unreleased.

He has also lived out his passion internationally: Hasle played in Berlin, Bangkok, and on Koh Phangan, Thailand – where he is a regular part of the vibrant underground scene during the winter season. In 2017, he founded his own label, Ensemble Music.

In addition to his work as a DJ, he has been applying his expertise as a state-certified audio engineer (EFZ HF) since 2016 in professional live sound and event production, and he regularly offers DJ courses for newcomers.

After taking a creative and academic break starting in 2017, his comeback began in 2022 with a performance on one of the Love Mobiles at the Street Parade. Today, he continues this energy with the creation of his new party label called Limmat Legends, which he founded together with friends to celebrate their shared passion for electronic music. The first event took place at Club Bellevue in Zurich and will continue on October 18, 2025, at Club Frau Rädli.

With nearly three decades of DJ experience, he knows exactly how to ignite a dance floor and keep the energy alive. Whether on the dance floor or in life – standing still is not an option for him.
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