DJ Heartstring has been played on NTS shows including Word of Command, with Lost In Emotion first played on 15 December 2021.

Leo and Jonas, together DJ Heartstring are a Trance Dance Music duo based in Berlin, Germany. The duo produce and remix tracks for a eurodance trance style sound.

The duo broke through in 2021, with the AVA festival Boiler Room set of 2023 bringing them to the forefront for a wider audience of techno and pop fans alike.