This module controls Sonic Pi via its local OSC server. The server runs on 127.0.0.1:4557 and receives OSC messages over UDP. Yes, this is RCE, but it's local. I suggest playing music. :-)
OSX
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security