Because every OSC environment is slightly different, the most important first task is to set things up so that not only can you send messages to Open Beat Control, but it can send information back to you.
To send messages to Open Beat Control, you will need to configure your
OSC sending system to know the host that it is running on (this will
generally be the same as the host that your other software is running
on, so you can use the very fast
localhost address), and the port
number on which Open Beat Control’s OSC server is listening. Unless
you changed it using the
--osc-port command-line argument,
that will be
So in its default mode of operation, you would configure a Max/MSP
udpsend object running on the same machine to send to Open Beat
udpsend localhost 17002. You can test your configuration
by telling it to send a
/log message, which causes OBC to
immediately log the message and any arguments to the console or log
But how does Open Beat Control know how to send information back to you?
Some OSC software automatically listens for responses on the port whose number is one higher than the port of the socket it is using to send messages. If that is the case for your software, you don’t need to do anything, because Open Beat Control will default to sending responses to that port.
But most software (including Max/MSP) does not work that way. In fact,
there is no easy way in Max/MSP to even find out what port number the
udpsend object is using to send its messages. It will be a different
port each time you open the patch, and if you have more than one
udpsend object in your patch, each will be using a different,
unpredictable port number. Instead, you pick a fixed port number for
udpreceive object to listen on. For example, you might choose
udpreceive 17004. Now you just need to tell Open Beat Control that
it should reach you on that port.
To do that, use your
udpsend object to send the OSC message
/respond 17004 (or whatever port number you actually used). That
will configure Open Beat Control to respond to any message from that
udpsend object to the port number you chose in the message.