The concept of duality is perfectly realized, both in the instrumental choice (orchestral vs 8bit), as in the harmonic colors (oscillation between major and minor) and the orchestral impact (light minimalist vs heavy full orchestra). The pieces are all quite different, but give a general unity through this duality chosen and assumed. The sounds complement each other, enrich each other and bring colors that none of the styles alone could have achieved. Nice surprises in some harmonic changes. The whole is particularly well written, rich, original, with particularly successful electro sounds. The arrival of bass in the tracks is always an happiness of deepness, artfully increasing the field of the sound spectrum. The complete OST would perfectly illustrate a Broken Age like adventure game, all smooth, and discreet complexity.