thanks to everyone for the kind words.
a few mentioned they would like a few more details, so here it goes. everything was done with 1 bar = 16 steps at 120 bpm. the setup was my eleven rack into input a of the octatrack and my analog four into input b. no p-locks were used. the crossfader wasn't used in this recording.
it's actually a very simple setup which speaks to the power of the octatrack. it's just me hitting play on the octatrack then playing my guitar. i started with everything but track 1 muted, which creates the initial ambience, then i brought in the drone and arpeggio and finally the live but heavily modulated guitar portions.
track 1 [flex]: records 1 full bar of the guitar input with a recording trig on step 1. has various playback trigs. main modulations are pitch and rate plus filter and dark reverb effects. this is what provides the evolving atmosphere, heard by itself at the beginning.
track 2 [thru]: thru machine on the guitar input with filter and lo-fi effects. the lo-fi had distortion, sample rate reduction, and heavy amplitude modulation, which is what provides the tremolo effect. the filter effect is modulated with an LFO, which is what provides the swelling live guitar.
track 3 [neighbor]: effect chaining reverb onto track 2. mix set at about 3 o'clock or 70% which reduces the live guitar's influence on the sound.
track 4 [flex]: plays back a single note sample of the guitar. pitch shifted and rate set at negative. effects are a filter and heavy reverb, with the reverb again set at around 70% mix. you here this come in at around 0:22. it's the drone in the background.
track 5 [thru]: thru machine for the simple analog four arpeggio you hear in the background that comes in at 0:17. the arpeggio is played by a pretty nice bell patch. it's given some resonance through the octatrack filter and lots of delay.
track 6 [neighbor]: another filter and some reverb on the arpeggio.
track 7 [flex]: plays back the recording buffer in recording 1, which is the buffer that track 1 is recording and playing back as well. i reduced the rate and added some delay, which is what provides the slightly delayed and octaved guitar in the background.
track 8 [master]: more dark reverb because why not?
the only processing i did was some basic equalizing in garageband to remove some overwhelming bass. i left everything else alone.