public RubberBandStretcher(int sampleRate, int channels, Options options = DefaultOptions, double initialTimeRatio = 1.0, double initialPitchScale = 1.0) { _rbs = RubberBandNativeMethods.RubberBandStretcher_Create(new IntPtr(sampleRate), new IntPtr(channels), (int)options, initialTimeRatio, initialPitchScale); }