Smartphone Symphony
summary
A live demo uses an Ember Present add-on and a Node server on AWS to send realtime messages that schedule audio across phones, with about 200 phones connecting and measured latency mostly under 100 ms; clocks sync via server timestamps so events play at planned times, letting 12 orchestral sounds trigger in rough unison while the server translates inputs to MIDI for Ableton Live. An earlier run crashes from a race condition but later runs mostly work.
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