DISCLAIMER; I’m an interested amateur with this stuff.
Start with a noisy waveform: square or saw (the one in the track Dione is closer to a saw). Make a chord: on the ST or A4 you’ll need multiple tracks for this. In Dione, it’s a minor triad - any root note, plus a note
semi-tones up and another note 7 semi-tones up. 4
The sound in Dione uses an envelope to modulate filter and amplitude. I can’t tell if it’s the same envolope: probably. The attack is very short, or 0. The sustain is low, or 0. The decay is fairly short, the release maybe a bit longer. As the track progresses, the filter cutoff (or the envelope modulation level) get raised, making the sound brighter. If you’re using an ST or A4, you’ll need to find a way to apply the same or similar change to the cutoff/modulation across the three voices. Options include: an external modulation source like a keyboard with a mod-wheel, or a BeatStep; using a Machine with two oscillators (SY BITS, DVCO) to get two of the notes, and only a 2nd track; etc.
The chord is being passed into a modern reverb with long decay and some damping.
Towards the middle-end of the track a sound comes in which, initially, I thought was the same chord passed into a delay, but it plays different notes, so it’s maybe a sample of the same chord, filtered a bit and then sequenced with a couple of different root notes.
The chord in Elevation is pretty similar. It’s got some distortion and the high end is a bit sharper: maybe the envelope is exponential (where in Dione it might just be linear). The way the tone of the chord moves as it plays at different pitches suggests it’s a sample through distortion and filtering, to me (rather than a sample that has the distortion baked in). The chord also passes through a delay with a dotted 8th time and enough feedback for 3-4 clear repeats. There may well be quieter secondary delays going on too. I think the delays feed into the reverb but I’m playing this quietly through a laptop and also just making this stuff up.
Elevation sounds like Dave Clarke’s Red 2 which did all the same stuff with chords, plus as phaser or flanger before the delays.
They sound like “dub chords” to me. It’s the rest of the track around the chords that doesn’t sound so much like “dub techno”.