Show Control 539
Open Sound Control (OSC)
Open Sound Control (OSC) is a protocol that uses network communication (wired or wireless) to
communicate between varying audio, video and lighting devices.
Using OSC
An OSC command contains a method and an optional list of arguments, or additional data for a par-
ticular command.
For example:
OSC Method Argument Action
/eos/chan 1 [Chan] [1]
/eos/chan/1/full None [Chan] [1] [At] [FL]
/eos/chan/1/at 50 [Chan] [1] [At] [50]
/eos/user/5/chan 1 [Chan] [1] (as User 5)
A device that receives an OSC string will process the command as if the current user on that device
typed the command.
All OSC commands directed to an Eos console must begin with /eos/. To direct an OSC to a particular
user for a single command, the command must begin with /eos/user/<number>/
It is possible to set the OSC User ID via an OSC command, in which case that user ID remains as spe-
cified until changed again.
Configuring OSC
UDP and TCP
Eos supports sending and receiving OSC through a TCP or UDP connection. The specific type used
will depend on the other OSC device or software that you intend to use with Eos. You will need to
check that documentation to confirm the connection types supported.
The console can be set to receive and/or transmit OSC messages. This is configured in Setup>Sys-
tem>Show Control with the {String RX} and {String TX} touchbuttons.
In addition, you must enable the {UDP Strings & OSC} option for the network interface you wish to
use in the ECU>Settings>Network>Interface Protocols.
TCP
The preferred method for transmitting and receiving OSC packets is over a TCP connection. Eos will
listen for incoming TCP connections on Port 3032. TCP communication still requires that {String RX}
and {String TX} is enabled in the Show Control section of Setup.
In the ECU>Settings>Network>Interface Protocols, there is an option for changing the OSC TCP
mode. By default, OSC 1.0 is selected. There are two TCP modes available – OSC 1.0 (packet-length
headers) and OSC 1.1 (SLIP). Check the documentation for the OSC device you wish to use over a
TCP connection to see which mode it supports.
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