// bass synth
// 1 = SinOsc
// 2 = TriOsc

public class SomeSynth
{
    // null references to two types of oscillators
    SinOsc @ sin1;
    SinOsc @ sin2;

    TriOsc @ tri1;
    TriOsc @ tri2;

    // initialize the oscillators, connect them to dac and set gain to zero
    fun void init(int osc1, int osc2)
    {
        if (osc1 == 1) new SinOsc @=> sin1 => dac;
        if (osc1 == 2) new TriOsc @=> tri1 => dac;

        if (osc2 == 1) new SinOsc @=> sin2 => dac;
        if (osc2 == 2) new TriOsc @=> tri2 => dac;

        this.noteOff();

    }

    fun void noteOff()
    {
        0 => sin1.gain => tri1.gain => sin2.gain => tri2.gain;
    }
}

SomeSynth ss;
ss.init(1, 2); // create a SinOsc and a TriOsc