This is a quick post with a few links to testing basic functionality of the Due and Uno. Primarily these videos focus on basic things like LED timing, LED response from button input and simple 8bit audio output.
First Video - timed LED sequence.
Second Video - asynchronous button input & LED output
Third Video - 8bit PCM output with the Uno
The asynchronous input is a crucial concept because it will allow the step sequencer to be played like a classic drum machine like an Akai MPC. My next step is to work on outputting 12bit, 16kHz PCM files off an SD card through the Due.