You mean this API: https://developer.sonos.com
ALMOST… I wish that was enough but its focus is adding some streaming service (like a pandora) to the Sonos control app. What I wish is they'd provide a full open API to control the entire units, so developers other than Sonos can make controller apps. There are hundreds of people trying to hack into the data stream and control the speakers, but little help from Sonos.
Sonos controller apps are so utterly bad UI design I am surprised there hasn't been a revolt among users. They need to embrace an open API and maybe open this up since patent is out. Become the defacto streaming standard to wireless speakers. But thanks for the reply.