Making Your Graphing Calculator a Musical Instrument

An anonymous reader writes: Thanks to a recently published open source music editor/sequencer, you can now create music on Texas Instruments graphing calculators. The complexity of the sound is impressive (video) for such a simple device, which does not feature any dedicated sound hardware. HoustonTracker 2 is open source, and is available for the TI-82, 83, 83Plus, and 84Plus.