Quarter Tones

[DeezNotes]

I don't know if it's been suggested before, but I'd love to be able to use quarter tones, with notes like these:

https://www.youtube.com/watch?v=gBlnY-f-2IM&t=2m24s

...to make music that sounds like this:

https://www.youtube.com/watch?v=D1Gol6YYjB4