| This is a home-grown visualization, with a couple lines of code copied | |
| from synaesthesia. It draws the waveform in the bitmap, then fades out | |
| the entire bitmap so older waveforms disappear. It looks OK, but it's | |
| grayscale so far (haven't solved the cmap problems, note all the commented | |
| out code). I'm going to try to make a much better version as time goes | |
| on. |