I just started using the Steinway library the other day, and let me say it is amazing. It inspired me to write some pieces for the piano and I thought I'd do a little experimenting with it.
This starts off with the sustain only:
I played a suspended chord then transfered it to audio and cut the attack. I then time stretched it so it was about twice as long and reversed the sample. So what you're hearing at the start sounds like a synth pad, but a little more natural. Then I did some other little things like EQ sweeps to bring some overtones in and out, and as it got louder I slowly dropped the wet channel and raised the dry. I also time stretched some violin trills then added some ambient city noises and other non-effected instruments. I even added some out of tune bells at times
Anyway, I tried to capture my old neighborhood in Chicago. It seemed a little chaotic at times, but really it was just a neighborhood with regular people and some interesting stories to go along with it.
The piece starts off a bit random, then goes into some pretty traditional writing (Piano and strings). I'm warning you that it starts off very quiet then gets pretty dag-gone loud for a second before going into the regular section. But enough of my jibber jabber.
The Old Neighborhood