Hello Sir/Madame,
As per "http://upnp.org/specs/av/UPnP-av-RenderingControl-v1-Service.pdf" "As described in Media Renderer device template, the devices’s ConnectionManager::PrepareForConnection() action assigns a InstanceID to the input stream".
I tried to mute a windows machine in our local network using "Universal-ControlPoint "but it failed so we thought since InstanceID was not correct.Is our understanding is correct?