Hi Paul,
Thanks for the video and trying out the code. One thing I didn't do in the code is to account for size of displays. Personally I think the waveforms would look better if they were tweaked to suit your larger screen. It looks good and fast though. Almost 100fps realtime for that screen size is really good. My Atmega 328p +TLC5940 based 16x8 matrix calculates pages at just over 30FPS, however, the screen refreshed by the TLCs at 150Hz.
Anyway, thanks for the feedback.