Atari 2600 Custom Waveforms

In a very real sense, this is a follow up to a previous post about equal-tempered tuning on the Atari 2600. I love the Atari 2600 in-built timbres, but wouldn't it be nice if there could be some other waveforms too?

Well, I've been working on a way to do just this, although it's mainly experimental at the moment. Here are some waveform snapshots, recorded from an Atari 2600 that was being controlled via MIDI in real time. The waveform shape is chosen via MIDI as well.