The bassline in Heartbeat is peak 2009 electro. It’s got that gritty, distorted Klaas sound that you just don't hear much anymore in modern house.
The video uses a cold, high-contrast grade—lots of blues, greys, and deep blacks—which complements the "robotic" and mechanical feel of the electro-house genre. Cultural Context and Legacy Klaas - Heartbeat (Official Video HD)
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 bassline in Heartbeat is peak 2009 electro