When you quantize a photo, you are essentially taking every pixel's R, G, B values and representing them with fewer bits than the normal eight. Oftentimes, the human eye cannot really notice the resultant loss in color quality. I decided to take advantage of this freed up space and store different binary data in the remaining unused bits, namely music!
What does it look like?
In visual form, storing "random" binary data in the lower-order bits of the pixels shows up as noise in the photo. In big enough photos, this is barely noticeable.
In short: Noise files become noise in photos!