Chartist Aspect Ratio Demo
https://gionkunz.github.io/chartist-js/getting-started.html
.ct-square	1
.ct-minor-second	15:16
.ct-major-second	8:9
.ct-minor-third	 5:6
.ct-major-third	 4:5
.ct-perfect-fourth	3:4
.ct-perfect-fifth	 2:3
.ct-minor-sixth	 5:8
.ct-golden-section	1:1.618
.ct-major-sixth  3:5
.ct-minor-seventh	 9:16
.ct-major-seventh	 8:15
.ct-octave	1:2
.ct-major-tenth	 2:5
.ct-major-eleventh	3:8
.ct-major-twelfth  1:3
.ct-double-octave  1:4