Homem-Christo made music together and separately, in a similar process to their debut album Homework. Although they used the same equipment as they had for Homework, the duo sought to record tracks that were more concise than their previous work. For Discovery, the group used different samplers and synthesizers, including Akai MPC, E-mu SP-1200, Oberheim DMX and LinnDrum. The track "Short Circuit", which features a Sequential Circuits drum pattern, was previously heard in Daft Punk's 1997 live sets. For vocoders, the group used a Roland SVC-350, and a DigiTech Vocalist. Production on the album also incorporated a PC with Auto-Tune and an early version of Logic. Every track on Discovery uses a different phase shifter. The album was mastered by Nilesh Patel, who also had mastered Homework. One of the first tracks to come out of the Discovery sessions, "One More Time", was completed in 1998 and was left "sitting on a shelf" until its single release in 2000. After completing "Too Long" early in the album's production, Daft Punk decided that they "didn't want to do 14 more house tracks" in the way the genre is usually defined, and thus set out to incorporate a variety of styles for the record. The album features musical contributions from Romanthony, Todd Edwards, and DJ Sneak. Homem-Christo noted that Romanthony and Edwards were two of the producers that had a big influence on Daft Punk. The duo had wanted to work with them on Homework, but found it difficult to convince them to do so since Daft Punk were still relatively unknown. DJ Sneak wrote the lyrics to "Digital Love" and assisted in the song's production. Music Theme Discovery is recognized as a concept album. It relates strongly to Daft Punk's childhood memories, incorporating their love of cinema and character. Thomas Bangalter specified that the album deals with the duo's experiences growing up in the decade between 1975 and 1985, rather than it just being a tribute to the music of that period. The record was designed to reflect a playful, honest and open-minded attitude toward listening to music. Bangalter compared it to the state of childhood when one does not judge or analyze music. Bangalter noted the stylistic approach of the album was in contrast to that of their previous effort. "Homework [...] was a way to say to the rock kids, like, 'Electronic music is cool'. Discovery was the opposite,