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Package org.simbrain.world.oscworld

(Currently unused) A world which allows sounds to be produced using open sound control.

See: Description

Package org.simbrain.world.oscworld Description

(Currently unused) A world which allows sounds to be produced using open sound control.

Summary

The OpenSound Control (OSC) world adds OSC in and OSC out support to Simbrain. OpenSound Control is a communication protocol which allows musical instruments (especially electronic musical instruments such as synthesizers), computers, and other multimedia devices to share music performance data in realtime over a network. [1]

Simbrain to OSC out

The OSC world can be coupled to a network in order to send OSC messages with a single float argument to external applications. More than one OSC message sender can be configured to produce messages with different OSC Address Patterns [2].

Example

  1. Create a network with at least one neuron

    2. Insert --> New Network
    Right click --> New Neuron

  2. Open an OSC world

    3. Insert --> New World --> OSC World

  3. Create a new OSC out message

    4. File --> Create OSC out message
    Type "/melody" and hit OK.

  4. Couple the neuron's activation to the OSC message's /melody, f attribute

    5. Right click on the /melody, f OSC message --> Set input source --> Network --> Neuron_1 --> Activation
     or
    Right click on the neuron --> Set output target --> OSC World --> OSC Message --> /melody, f

  5. Set up an external OSC application to generate sound from the /melody OSC messages

    6. For example, run the following script in ChucK [3]:

    melody.ck: 

    SinOSC melody => dac;
0.5 => melody.gain;

OscRecv recv;
9999 => recv.port;
recv.listen();

recv.event("/melody, f") @=> OscEvent @ melodyEvent;

spork ~ pollMelodyEvent(melodyEvent);

me.yield();

while (true)
{
    1::second => now;
}

fun void pollMelodyEvent(OscEvent event)
{
    while (true)
    {
        event => now;
        while (event.nextMsg())
        {
            1760.0 + (800.0 * event.getFloat()) => melody.freq;
        }
    }
}

    From the command-line: 

    $ chuck melody.ck

  6. Activation changes in the neuron result in changes to the sound frequency

    7. Double-click on the neuron
    Set Neuron type to Random
    Click OK

    Click Global iterate network update algorithm button

OSC in to Simbrain

The OSC world can be coupled to a network in order to receive OSC messages with a single float argument from external applications. More than one OSC message receiver can be configured to handle messages with different OSC Address Patterns [2].

Example

  1. Create a network with at least one neuron

    2. Insert --> New Network
    Right click --> New Neuron

  2. Open an OSC world

    3. Insert --> New World --> OSC World

  3. Create a new OSC in message

    4. File --> Create OSC in message
    Type "/pulse" and hit OK.

  4. Couple the neuron's activation to the OSC message's /pulse, f attribute

    5. Right click on the /pulse, f OSC message --> Set output target --> Network --> Neuron_1 --> Activation
     or
    Right click on the neuron --> Set input source --> OSC World --> OSC Message --> /pulse, f

  5. Set up an external OSC application to send /pulse OSC messages

    6. For example, run the following script in ChucK [3]:

    pulse.ck: 

    OscSend send;
send.setHost("localhost", 9998);

while (true)
{
    send.startMsg("/pulse", "f");
    Std.rand2f(0.1, 0.9) => send.addFloat;

    1::second => now;
}

    From the command-line: 

    $ chuck pulse.ck

  6. OSC pulse messages change the neuron's activation

    7. Click Global iterate network update algorithm button

Acknowledgements

The OSC world is based on the JavaOSC library [4].

References

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