Thanks for the comment!
The software that I use (Linux MultiMedia Studio) doesn't allow me to see the shape of the wave -- although I'm new enough at the software that I might be looking in the wrong place. The "voices" that I used were under the "8-bit invader" voice category or were titled "chip-xxxx". It's very possible they are more complicated than what the voices in this are intended to be, I just don't know how to see that for sure.