private unsafe static extern double SDTScraping_dsp(SDTScraping *x, double input);
private unsafe static extern void SDTScraping_setVelocity(SDTScraping *x, double f);
private unsafe static extern void SDTScraping_setForce(SDTScraping *x, double f);
private unsafe static extern void SDTScraping_setGrain(SDTScraping *x, double f);
private unsafe static extern void SDTScraping_free(SDTScraping *x);
public unsafe Scraping(Resonator r) { scrape = SDTScraping_new(); resonator = r; }