Stein told the story of the song in an interview with Ministry of Sound
: "I started 'Louder' at the end of last year, it began as an instrumental though it was always supposed to be a song with a vocal. I played it out at a festival in Belgium and the crowd went nuts! Sian Evans (who I knew from her days as frontwoman of Kosheen) and I had been talking about working on something together for a while and it seemed like the perfect track. I had a muffled recording of the chorus (with slightly different words), and I'd excitedly got out of bed to sing into my phone at about 3 o'clock in the morning one night. When Sian started scatting around it it worked perfectly, we changed a few words, notes etc and then wrote the verses, the whole song was written like that in just one night!"