On the seven-year anniversary of Zedd's "Clarity," which was co-written by Porter Robinson, Skylar Grey and Matthew Koma, Zedd publicly celebrated what became his first Hot 100 hit, writing, "SPECTRUM CAME OUT 7 YEARS AGO AND CHANGED MY LIFE FOREVER."
In response, Koma took to social media, denouncing his former collaborator as "toxic" and "self-serving" in a long Instagram post. "It’s a really sad truth because I’m extremely proud of the work he and I did together,” Koma wrote. “Unfortunately, my good feelings toward these songs have all but disappeared.”
Koma said he met Zedd via their label Interscope to work on what would become Zedd's hits "Clarity" and "Spectrum." He claimed Zedd suffered from an obvious "inferiority complex" and took small "blows" at him in interviews, apparently saying he'd written Koma's lyrics and refusing to pay him for recorded vocals. Koma also said he shared a song called "Suitcase" with the producer, and when Zedd allegedly demanded the right to release the song under his own name with a different singer, Koma refused, released the song on his own four years later.