The snare and claps are crisp and sit high in the mix, designed to cut through the acoustics of large club environments.
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. Klaas - Heartbeat (Official Video HD)
The track is often remembered for its "infectious" energy and its ability to maintain a high peak throughout. The snare and claps are crisp and sit
The vocal hook is simple and repetitive, serving less as a narrative and more as an additional rhythmic instrument to build tension before the drop. Visual Aesthetic (Official Video) Klaas - Heartbeat (Official Video HD)