Just as each of the main locations that the player can visit are unique from each other, I used a different instrumentation for each each location's track in order to differentiate them while still maintaining a cohesive feel to the overall soundtrack. The instruments used for the soundtrack were separated into earthly instruments (to be used in the land of the living) and divine instruments (to be used in the Duat and the Skyway). The divine instruments included the ney, the harp, and the sistrum (which I used finger cymbals to mimic). These instruments were often used in religious ceremonies. While there are several Ancient Egyptian gods associated with the creation of music, some legends say that Osiris used music to bless and civilize the world, so it felt fitting to use instruments that were used to worship the gods in the divine areas of the game. The first sound the player hears is the sistrum in the Glade, followed shortly by the ney, representing the ritual that Osiris would soon learn Isis had completed for him. Just as Osiris begins the adventure with the taste of the river in his mouth, the player begins with the sound of music in their ears. The ney can also be heard playing a more melodic and lullaby-like tune while interacting with the gods of the Skyway as they overlook Egypt at night. This ney plays alongside a harp that twinkles like stars until the mighty and muscular Ra appears, at which point it shifts temporarily into a percussive and uncompromising force. The earthly instruments included the zurna, the duduk, the qanun, the oud, the riq, the doumbek, and the daf. Sometimes, these instruments were used to represent the feelings of the people found in a particular location. For example, the duduk was written in such a way in the Nile (Iteru) soundtrack to evoke Isis and her powerful emotions when reuniting with Osiris. Meanwhile, the oud maintains a heartbeat-like pulse underneath the duduk—steady, but not without the occasional jump and a growing intensity, just as Osiris' heartbeat would have been had he still been alive during their reunion. Other tracks utilized instrumentation representative of the physical location. Sepermeru is the only track that uses both the riq and the daf in order to emphasize the desert surroundings, while Nekhen's use of the daf as its only percussion instrument creates a sound that is more akin to pushing sand and stone away to reveal a new clue. The bass clarinet, which is the one instrument used in both an earthly location and a divine location, gives Nekhen an ancient, almost ominous feel just as it does the Cavern in the Duat. The bustling city energy described in Heliopolis comes through in that track's assortment of instruments, alongside its energetic (almost frantic) melodies and rhythms. The tracks in the divine areas also use stronger reverb, that lack of which brings an almost jarring sense of clarity to the earthly tracks for the player in tandem with the game's description of Osiris' return to the feeling of an earthly body.