This is the only thing we've done quite like this. Thanks to a bunch of passes on the trombone from tucker dulin, we get into an odd place here. "gsjm" came together gradually, beginning with sax and synths played over a drum loop (not audible in the final mix). Then the trombones were added, recorded in the vault at 14 Wall St (see pic below). The drums were the last thing recorded, phrasing with the entire orchestration. A lot of our music uses this sort of layering process. Often some of the first layers don't make it to the final mix. This can give the music a larger spread and range without making it too dense or arbitrarily disjointed.
I've been known to use this choir sample -on an old EPS 12bit keyboard sampler- way too much, but I think it works here.