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Pure data open sound control8/23/2023 ![]() Null, meaning there are no values (tt: ’N’).Arbitrary sized binary data ‘ blob’ (e.g.Boolean type (tt: ‘T’: true, ‘F’: false).TWO also supports the following Type Tags, although these are less frequently used, and not always supported by OSC-capable programs. The TTS is a compact string representation of the argument types. The AP is a string specifying the entity or entities within the OSC server to which the message is directed, a hierarchical name space, reminiscent of a file-system path, or a URL. To describe OSC i paraphrase its creators : the basic unit of OSC is a message, consisting of an Address Pattern (AP), a Type Tag String (TTS), an optional time tag, and arguments. So, for example where a note-on MIDI message is an arcane cryptic series of numbers: 1001 0011–0100 0101–0100 1111, an analogous OSC message would be: /Synth/MIDI/Channel_1/Note_On, tt: “ii”, 69, 79. Finally, OSC messages are self-descriptive: just by looking at the text of a message, you can tell what it is for, unlike with any of its predecessors. A second advantage is that older protocols can be straightforwardly translated to and from OSC. The great advantage of OSC is that while there is a per-message schema, there is no overall fixed schema to define or restrict the set of possible messages, as is the case with legacy protocols (e.g. Zeal has created an in-depth explanation and tutorial video on OSC, explaining the what and the why, as well as how it can be used to have Max/MSP and Processing communicate. OSC gives musicians and developers more flexibility in the kinds of data they can send over the wire, enabling new applications that can communicate with each other at a high level. OSC messages are commonly transported within home and studio computer networks, but can also be transmitted across the internet. It was originally intended for sharing music performance data between electronic musical instruments, computers, and other multimedia devices. ![]() Open Sound Control (OSC) is a content format developed at CNMAT by Adrian Freed and Matt Wright.
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