"/Users/carlyncohen/Desktop/potatoes.txt" => string dataFile;

// update rate in ms
200.0 => float update; 

// new class to manage envelopes
class Env
{
    Step s => Envelope e => blackhole; // feed constant into env
    update::ms => e.duration; // set ramp time
    fun void target (float val) { e.target(val); }
}

class Player
{
    TriOsc s => NRev rev => dac;
    rev.mix(.5);
    Env amp, freq;
    fun void run() // sample loop to smoothly update gain
    { 
        while (true)
        {
            s.gain(amp.e.last());
            s.freq(freq.e.last());
            1::samp => now;
        }
    }  spork ~ run(); // run run
}

DataReader potato;
potato.setDataSource(dataFile);
potato.start(); 
Player p;
while (!potato.isFinished())
{
    // next data point, scaled in 0.0 - 1.0 range
    potato.scaledVal() => float w; 
    p.amp.target(0.5 * Math.pow(w, 2.0));
    p.freq.target(Std.mtof(50 + w*20.0));
    
    300::ms => now;
}