Whatever you consider the human limit of musicianship has been exponentially surpassed by Archspire. This Canadian technical death metal band twists the intensity dial beyond 11, breaking the speed barrier with memorable songs that are extreme even for a genre as extreme as death metal.
While "tech mapping" is usually associated with electronic rhythm game songs, Archspire's pieces are here to shift that paradigm. Their complicated rhythms and high note density makes for some of the fiercest beatmapping that osu! can sustain, meaning you'd be best off engaging with Archspire's music after gaining both mapping and playing experience.