it’s essentially just two instances of ableton’s vocoder. I duplicated amelia’s main vocal track twice (so three total tracks); one is the main clean vocal, one is that same track but through the vocoder with the top bands tamed down, and then (starting at the line “oh life / dying out”) the third track is the vocal pitched down an octave and then vocoded with the same synth as the other vocoder track, and run through the stock ableton saturator. the carrier is stupidly simple, just ableton’s ‘analog’ synth with two saws and no filter. oh and i turned on the portamento when the second vocoder comes in to make it feel like it’s loosening up.
i really love the stock vocoder in ableton, it’s so flexible. i’ve been using this trick of doubling the modulator with a pitched down instance of itself for a while and highly recommend trying it out - ableton’s different algorithms all provide slightly different colors in this context, but i also do the same thing using soundtoys’ little alter boy plugin.