sclass PianoSampler {
  double sampleRate = 48000;
  double currentSample;
  
  persistable sclass Oscillator extends HasKey<Frequency> {
    double currentPeriodStart;
    // all recorded intensities
    new TreeMap<DoubleRange, Complex> intensities;
    
    *(Frequency f) { super(f); }
    
    Frequency frequency() { ret key(); }
    double interval() { ret frequency().interval(); }
    
    void record(DoubleRange r, Complex c) {
      intensities.put(r, c);
    }
    
    O phase90() { ret currentPeriodStart + interval()*.5; }
    O phase180() { ret currentPeriodStart + interval(); }
    O phase270() { ret currentPeriodStart + interval()*1.5; }
    O phase360() { ret currentPeriodStart + interval()*2; }
  }
  
  HasKeyMap<Frequency, Oscillator> oscillators = new(map(f -> new Oscillator(f), pianoFrequencies88()));
  new TreeMultiMap<Double, Oscillator> actionsForSample;
  
  *(double *currentSample) {}
  
  void init {
    for (o : oscillators) {
      o.currentPeriodStart = currentSample;
      actionsForSample.put(cu
  }
}