Some Nuito albums, they are a math rock band from japan and you can notice how their music becomes more and more complex on each release and their music becomes entirely instrumental
>N^1 (2006)
>192kbps
http://www.mediafire.com/download/ajatceq71a5o1kh/N1.zip

>Anaphylaxis (2007)
>kind of shitty quality (128kbps) but it's the only copy that exists so far
http://www.mediafire.com/download/4uupm4nemf3hxy7/Anaphylaxis.zip

>Unutella
>320kbps
http://www.mediafire.com/download/cy0h3tw3ciofeg7/Unutella.zip