Processing calls an API, parses a a JSON value from the response and shows it on screen.Extend with a) have it call your spark-core to get relevant data value, and b) based on the value decide what sound to play

processing_http_json

import http.requests.*;

// Sune for Hyper Hardware 
// install the "HTTP Requests" library: "Sketc" > "Import Library" > "Add Library" and type "HTTP Requests".  
// https://github.com/runemadsen/HTTP-Requests-for-Processing

int timer;

void setup() {
}

void draw() {
    if (millis() - timer >= 2000) {
      // every 2 seconds...
      
      // example of API which returns some JSON data: http://openweathermap.org/current
      GetRequest get = new GetRequest("http://api.openweathermap.org/data/2.5/weather?q=Stockholm,Sweden");
      get.send();
      String response = get.getContent();
      println("Reponse Content: " + response);
      
      // example of JSON parsing: http://forum.processing.org/two/search?Search=json+example
      JSONObject ob = parseJSONObject(response);
      JSONObject main = ob.getJSONObject("main");
      int temperature = main.getInt("temp");
      println("temperature: " + temperature);

      background(random(255));
      text(temperature, 10, 30); 
      
      timer = millis();
    }
}