The following opcodes model or emulate the sounds of other instruments (some based on the STK toolkit by Perry Cook): bamboo barmodel cabasa crunch dripwater gogobel guiro mandol marimba moog sandpaper sekere shaker sleighbells stix tambourine vibes voice Also, see the STK Opcodes section for information on the STK opcodes. Other models and emulations lorenz planet prepiano Fractal Number (Mandelbrot set) generator: mandel chuap gendy gendyc gendyx A section on physical modeling using the waveguide principles can be found here: Waveguide Physical Modeling