Week6 - SuperCollider - HID

Setting up the HID (Human Interface Device) seemed fairly simple. I attached a fairly simple SynthDef to get my HID to do some controlling magic. The problem is that I return a nil value when I use the HID (I want to call it a HID device, but that's like calling an ATM an ATM machine). Thus, I get no sound. Anyway, here is a post of my code:

HUMAN INTERFACE DEVICE
(
HIDDeviceService.buildDeviceList(
    usagePage:     nil,
    usage:        nil);
)   
HIDDeviceService.devices;       
(
//Establish Device and Element List
HIDDeviceService.devices.do(
{    //Arguments
        arg    dev;
    //DeviceInfo
        ["DEVICE", dev.manufacturer,  dev.product,  dev.usage,  dev.vendorID, dev.productID, dev.locID].postln;   
//Loop & Output Elements
    dev.elements.do(
    {    //Arguments
            arg    ele;
        //Elements
            [ele.type, ele.usage, ele.cookie, ele.min, ele.max].postln;
    });
});       
)

//Queue Device & Assign an Action
HIDDeviceService.devices.at(0).queueDevice;

//SynthDef
(
SynthDef(
\ambient,

    {
    //Arguments
    arg     resFreq         =     500,
        crackleMul    =    0.15,
        dur            =    6,
        legato        =    4;

    //Variables
    var    ambient,
        env;


    //Crackle
    ambient = Ringz.ar(    Crackle.ar(1.1, crackleMul),
                    resFreq,
                    1.2,
                    0.5
                    );

    //Envelope
    env        =    ambient * EnvGen.kr(Env.perc(
                                    0,
                                    dur*legato),
                                doneAction:2
                                );   
    //Output
    Out.ar(0, [env, env]);
    }
        ).send(s);
)
//Create Instance of Synth
~hidSyn    =    Synth(\ambient);

//Action 1
(
HIDDeviceService.action_({
//Arguments
    arg    productID,
        vendorID,
        locID,
        cookie,
        resFreq,
        val;
   
//Parameter manipulation
    ~hidSyn.set(\resFreq, {val * 5});   
//Output
    [productID, vendorID, locID, cookie, val].postln;
                });
)
       
//Start the Event Loop
HIDDeviceService.runEventLoop;

//Stop the Event Loop
HIDDeviceService.stopEventLoop;  

REFERENCES:
Haines, Christian. 2006. Human Interface Device. Tutorial presented at the Electronic Music Unit, University of Adelaide, 31 August.