Osc Client

OSC-Client

What is OSC?

“Open Sound Control (OSC) is a protocol for networking sound synthesizers, computers, and other multimedia devices for purposes such as musical performance or show control. OSC’s advantages include interoperability, accuracy, flexibility and enhanced organization and documentation.” [ https://en.wikipedia.org/wiki/Open_Sound_Control ]

What is implemented in Mixxx

This branch can send for each deck:

• if it is playing
• the title,
• the volume,
• the (relative) play-position
• the duration of the loaded song

Additionally the number of decks is transmitted

How to use it?

Mixxx works as a osc-client. In order to get the data, you need an osc-server.

If you want to use the data in your own application you can set up your own server. An example implementation can be found here: http://liblo.sourceforge.net/examples/

OSC-Sceme:

osc path	description	parameters
/mixxx/numDecks	the number of Decks	numDecks (int)
/mixxx/deck/playing	Is the deck playing?	deckNr (int) isPlaying (int)
/mixxx/deck/volume	The real volume of the deck. Including crossfader. Zero if not playing	deckNr (int) volume (float)
/mixxx/deck/pos	The relative play-position	deckNr (int) position (float)
/mixxx/deck/duration	The absolute duration	deckNr (int) duration (float)
/mixxx/deck/title	The title of the playing song	deckNr (int) title (string)

The messages are sent every half second and on ui changes (e.g. if play was pressed)

How to test?

By dump_osc 7777 you can print the osc-packages generated by mixxx. (assuming you use 7777 as port)

(on Ubuntu dump_osc is provided by `pyliblo-utils`)