Effect of aperture on depth of field

So I got a new lens the other day, which at f/1.4 is the fastest lens in my bag. In order to see how short the depth of field is at f/1.4, I focused on middle C and snapped a pic.  Then just for giggles, I ran through several shots at increasingly wider apertures to see how it looked.  Here's an animation showing what it looks like at varying apertures: