All instruments are custom Modsynth instruments except for some percussion samples. If you're curious just ask or do a site search for "probability". The melody, bass, low pad etc. are all algorithmic, the song never sounds the same twice. The only actual notes I entered were to trigger the percussion samples. Everything else is a C major scale of stacked whole notes.
The heavy lifting is done by the random setting of the arpeggiator and LFOs. The "melody track" utilizes the "Nitro Super Switch" by Nitro and paulovski. You can read about that here:
You can find the free percussion samples by Venus Theory in the description of this video:
I also posted a cool video for this song (still a WiP) here: