Instreamer-Exstreamer How To
How to configure a Instreamer-Exstreamer audio connection within the same LAN
There are different ways to send analog (line-in) or digital (S/PDIF) audio from a Barix Instreamer over the network to the Barix Exstreamer where your speakers could be connected.
Additionally to the modes mentioned below, you can send audio from the Instreamer or the Annuncicom to the Exstreamer´s “Priority Ports”, this works in all Exstreamer modes.
Chapter 1 & 2 show the configuration with the Standard firmware for the Exstreamer, in chapter 3 are examples for the Exstreamer Streaming Client firmware (available on www.barix.com).
First you always should assign fix IP addresses to each unit. DHCP is also possible but a fix IP has some advantages.
Delay / Latency
In the Exstreamer web setup on parameter “Start Threshold” (under Streaming) you can adjust the delay. The delay can be from below 200 ms up to serveral seconds, depending from the used audio bandwidth (Codec, frequency/quality) in the Instreamer and the audio buffer (Start Threshold) in the Exstreamer. A higher audio bandwidth fills the buffer faster and causes a lower delay.
Calculation example with a 128 kbit stream and a default buffer of 60000 byte:
128000 / 8 = 16000 bytes /s 60000 / 16000 = 3,75 s
The start delay is approx. 3,75 seconds plus network delay, which is almost nothing in a local LAN . In our test lab we have reached by using MP3 a lowest possible delay of 175 ms, lower delays are possible by using PCM or G.711 . A delay of 200 – 250 ms by using MP3 should run in the most stable LANs.
1: HTTP Pulling
The Instreamer supports up to 6 http connections at the same time. For this you need the following configuration:
Instreamer:
Streaming / “Radio Path” = /xstream
Streaming / “Stream to” = Internet Radio : 0.0.0.0 : 80
Both are default values. The default Port 0 together with “Internet Radio” in the “Stream to” line would mean also port 80.
Exstreamer:
(with Streaming Client firmware)
Streaming / “URL x” = http://"ip address of the Instreamer"/xstream
(with Standard firmware)
Streaming / “Mode” = 3 Streaming Puller
Streaming / “Server IP address” = (IP of the Instreamer)
Streaming / “Server Port” = 80
Streaming / “Server Path” = /xstream
2: Receiving
For this mode you can use RAW UDP , RAW TCP or RTP. Our favorite mode is RTP streaming (more details in our RTP guide) !! RTP is UDP based which is the best for realtime streaming with lowest latency. RAW TCP is limited to max 8 connections. With UDP / RTP you can send the stream to max.8 Exstreamers directly or also as broadcast or to a multicast address to all Exstreamers in your network (could be 100 or more). Using broadcast or multicast addresses causes also a syncron playback on all Exstreamers if the same Buffer (UDP – Start Threshold) size is used.
RTP:
Instreamer: (needs minimum Firmware 2.02) Audio / “Bit Reservoir Mode” = kept empty Streaming / “Stream to” = RTP : (Exstreamer´s IP): 4444
This works also with a Broadcast (e.g. 192.168.1.255) or a Multicast (e.g. 224.0.0.1) IP address !
Exstreamer: Streaming / “Mode” = 4 Streaming Receiver Streaming / “RTP Receive Port” = 4444
RAW TCP:
Instreamer : Streaming / “Stream to” = RAW TCP : (Exstreamer´s IP) : 2020
Exstreamer: Streaming / “Mode” = 4 Streaming Receiver Streaming / “TCP Streaming Listen Port” = 2020
The Instreamer could send the RAW TCP stream also to the Exstreamer`s “TCP Priority Streaming Listen Port”.
Note, don`t use two times the same port number one the same Exstreamer !
RAW UDP:
Instreamer : Streaming / “Stream to” = RAW UDP : (Exstreamer´s IP) : 3030
Exstreamer: Streaming / “Mode” = 4 Streaming Receiver Streaming / “UDP Streaming Listen Port” = 3030
The Instreamer could send the RAW UDP stream also to the Exstreamer`s “UDP Priority Streaming Listen Port”. Note, don`t use two times the same port number one the same Exstreamer !
3: Using the Exstreamer Streaming Client firmware
This firmware is a special firmware which can run on all Exstreamer platforms. It´s a dedicated streaming application with enhanced monitoring features and stream backup feature ! This firmware is downloadable from www.barix.com (under downloads) .
RTP:
Instreamer: Audio / “Bit Reservoir Mode” = kept empty Streaming / “Stream to” = RTP : (Exstreamer´s IP): 4444
This works also with a Broadcast (e.g. 192.168.1.255) or a Multicast (e.g. 224.0.0.1) IP address !
Exstreamer Streaming Client: 1. URL : = rtp://0.0.0.0:4444
BRTP:
Instreamer: (needs min. Firmware 2.06 !) Audio / “Bit Reservoir Mode” = kept empty Streaming / “Stream to” = BRTP : 0.0.0.0: 5555
Note, this is only on the first “Stream to” entry available, not on the entries 2-8 !!! This opens a BRTP listen port where multiple Exstreamers can pull a stream from !
Exstreamer Streaming Client: 1. URL : = brtp://Instreamer-IP:5555
HTTP:
Instreamer: Streaming / “Radio Path” = /xstream Streaming / “Stream to” = Internet Radio : 0.0.0.0 : 80
Both are default values. The default Port 0 together with “Internet Radio” in the “Stream to” line would mean also port 80.
Exstreamer: Exstreamer Streaming Client: 1. URL = http://Instreamer-IP/xstream
If you have changed the port number on the Instreamer´s “Stream to” entry to anything else than 0 or 80 (e.g to 3333) then you have to use the following URL line : http://Instreamer-IP:3333/xstream
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