For this one I grabbed five harmonics, by eye, from a field recording I made on a trans-Pacific flight from SFO to AKL. The frequencies were: 45Hz (F#0), 158Hz (D#2), 341Hz (F3), 562Hz (C#4) and 2170Hz (C#6).
Five Ableton Corpus devices, set to either tube or pipe, were allowed to harmonise at those frequencies (or octaves thereof). They were then gated, in various ways, based the field recording. These were then sent to a group track that split the signal 50/50 wet and dry, the wet signal passing through a XILS 3.2 LE in FX mode for a ring mod and filter.
I then recorded 25 seconds of the resulting sounds and split them into four channels using the Regroover Pro software. These, depending on their pitch I considered to be bass, mids, treble and highs. The bass was Paulstretched by 8 times, the mids stretched by 4 times and the treble stretched by two. The four tracks where then arranged with a shimmer reverb and a touch of blackhole reverb and mixed with the original field recording.
Might not be particularly musical but it is somewhat evocative of being stuck in an aluminium tube at 35,000 feet.
[Edited because I completely forgot to mention the gating on each of the Corpus tracks.]