You can use VCX library to communicate with external network devices such as Barix Exstreamer/Instreamer/Anuncicom (www.barix.com).
Set audio format (a codec and sampling rate) the same as in the Barix device. Use vcproIpServerX component for receiving incoming audio stream (from Instreamer), vcproIpClientX component to send audio stream to the device (to Exstreamer), or use both of them for bi-directional communication (with Anuncicom).