American company ehômesys specializes in IP-based home entertainment systems. Its solutions allows to create both single room and multi-room system (up to 30 rooms). ehômesys systems offers PVR functionality, play-back DVDs, watching LiveTV (full HDTV), browsing photo galleries, internet surfing. Additionally, they allow to control light and climate and connect security system. So, ehômesys doesn’t offer just music play (if I’m not wrong).
ehômesys offers commercial systems. So, there is no any words about using OS and hardware. But I’d be very interested in to get more details about it.