This afternoon I've been working on a way of increasing the number of pitches that the Atari 2600 can play. The native pitch range of the device is actually really rather limited (for example - read up here: http://qotile.net/files/2600_music_guide.txt). For this setup, I'm using Atari 2600 hardware. It's MIDI controlled. The pitch range is now from around C1 to a G8, a massive and much more usable improvement.