Klaas utilizes his trademark distorted saw-wave lead. It’s aggressive, side-chained heavily to the kick drum, creating a "pumping" effect that became the blueprint for much of the EDM that followed in the early 2010s.
The snare and claps are crisp and sit high in the mix, designed to cut through the acoustics of large club environments. Klaas - Heartbeat (Official Video HD)
The track is built on a foundation of high-compression production that was revolutionary for its time: Klaas utilizes his trademark distorted saw-wave lead
Typical of dance videos from this period, it features a mix of high-fashion aesthetics and street-style choreography. It emphasizes movement and "pulse," visually representing the "heartbeat" through rapid-fire editing and flashing lights. The track is built on a foundation of
"Heartbeat" by is a definitive example of late-2000s electro-house, specifically leaning into the "hands-up" and "fidget" influences that made the German producer a global club staple. Released during the peak of the "Klaas Style"—defined by jagged, saw-tooth basslines and high-energy percussion—the track focuses on a relentless, rhythmic drive rather than complex melodic progression. Sound Design and Production
I remember this playing in every club. It wasn't about the lyrics; it was about that massive pumping side-chain that made the whole room move.