libgraphoscope: a project in need of a newer name

I'll prefix this with; when I wrote it, I needed a name meaning graphing on an oscilloscope. Later I found it had been taken for some time. This all started when I saw this video:

So, I wrote a little library that can render out to the audio-card. Now I just need to write a sweet demo like the above video.

It may require a little tuning in graphoscope_config.h for you particular soundcard.