hallo hallo! the first thought that came to my mind when thinking of gradient, for this project’s purpose, was vector synthesis.
the second thought was tripping with random color cycling in Fractint as a kid, but that’s hardly relevant 
now, there’s quite a few choices out there for vector synthesis, but I decided to go with the Arturia iProphet, an iPad emulation of the first, and somewhat ill-fated, synth making use of this technology: the Sequential Circuits Prophet VS.
all the sounds in this track are from the iProphet app. even within the limits of a mobile app emulation, I believe especially those super long evolving pads capture the concept of gradient pretty well.
musically speaking, there isn’t much interesting to say about the track, a simple improvisation around 3 notes. that kind of rotating sound around 1:30-1:40 is me frantically spinning the joystick around 
for the lead part, I used a very nice feature of the app, that lets you select exactly the bend range. so I set a 3 semitones range, and just played C-F-G, bending up C and G to obtain a full C minor pentatonic. alas, when I keep my hand on the pitch wheel, I find it extremely hard to not overdo it. which I regretfully did, in a few places.