
Given most pieces are so emotional and have an extensive backstory, their use in the game is very meaningful. Stanislav Bunin's commanded performance excellently emphasises the emotionally charged nature of the piece while flawlessly dealing with technical demands.

They range from the 'Raindrop Prelude', which sets a familiar and dreamy backdrop to the scenario with its repeated Ab quavers, to the 'Revolutionary Etude' with its tremendous flourishes at a passionate tempo. The majority of the pieces are very well known in popular culture and will be appreciated by most mainstream listeners. The soundtrack features seven full-length original performances of Chopin's solo piano works. Another highly accessible entry, "Is It Different or the Same?" dramatises its gentle woodwind-led melodies with various subtle nuances and more prominent features like the occasional chromatic diminutions and low piano chords. Fortunately, the sheer majority of the piece falls into the latter category and even the dull sections add to the wonderful mixture of darkness, exoticism, and romance portrayed in the scenario. Another piece for thought, "From Strength to Kindness" interchanges from being relatively static in the rhythm-based sections and utterly beautiful in those with a melody. Such pieces aren't authentic or special in their composition, but they complement the world inspired by Chopin so well. For example, tracks such as "Relaxing Place" and "Reflect the Sky, Bloom the Life" see the composer exploring the timbres of solo woodwinds to establish an airy and tranquil feel. Sakuraba's most convincing accomplishment of the album is building on this opening theme to embellish the ethereal world of Chopin's dream. Despite its individual elements being simple, "Pyroxene of the Heart" is an incredibly expressive and beautiful composition. After some agitated piano work and a descending glissando, this section repeats with greater intensity before a beautiful bridge leads to the recapitulation of the initial melody. After a solo piano interlude, the theme blooms at 1:44 the instrumentation remains similar, but each force offers raw passion to the theme and the dynamic level increased clearly inspired by the romantic nature of Chopin's compositions, this peak will touch and overwhelm listeners every time. This provides an entirely different context when the melody repeats, intensifying the sense of desperation and drama.

Sakuraba's harmonisation becomes more elaborate as the game's opening sequence develops. Opening with a distinctive piano and harp motif that depicts a fragile Chopin's fantasies, the voices of Sakuraba's wife and daughter soon intepret a dreamy melody and provide a desperate weeping quality.

The opening theme for Eternal Sonata captures the emotions of Chopin's bittersweet fantasy. The final soundtrack mixes recordings of Chopin's piano works with an overwhelming number of Sakuraba's original compositions. Instead he controversially decided to adapt but not transform his musicality for the soundtrack and integrated many of his obvious trademarks throughout. It was demanding for Sakuraba to portray the fantasy pastiche scenario and integrate Chopin's musicality in a complete authentic way. Due to his long-standing collaboration with the developer, progressive rock composer Motoi Sakuraba was given the demanding task of representing Chopin's dream. In 2007, tri-Crescendo released a fantasy RPG based on the dying dreams of romantic composer Chopin, entitled Eternal Sonata.
