[Jade smiles. That bad joke is the only thing Kano's done that Jade approves of.]

I see. What an awful joke. [no it was hilarious]

But in that case, these are products of scientific research. If your world is anything like mine, the technology involved came about through research development aimed both towards positive and negative ends. Some parts of it likely developed through military research on communication. Other parts may have come from civilian research for profit. Amateur research for the simple purpose of gaining knowledge or enjoying music may have filled in other parts of the scientific background necessary to produce this technology.