MembraneCircle : UGen : AbstractFunction : Object

Extension

Description

MembraneCircle and MembraneHexagon are rather similar, being triangular waveguide meshes of a drum-like membrane. You input some excitation, such as a pulse of noise, and can adjust the tension and loss while it plays.

They're named after the shape made out of triangular meshes. Obviously you can't make a circle out of triangles, but it tries. At the moment MembraneCircle is a bit bigger than MembraneHexagon, using more waveguides and therefore more CPU.

Class Methods

MembraneCircle.ar(excitation, tension: 0.05, loss: 0.99999, mul: 1.0, add: 0.0)

Inherited class methods

Instance Methods

Inherited instance methods

Examples

// Change MembraneCircle to MembraneHexagon for a different shaped

// circular drum head

s.boot;

s.reboot;

(

{ var excitation = EnvGen.kr(Env.perc,

                            MouseButton.kr(0, 1, 0),

                             timeScale: 0.1, doneAction: 0

                            ) * PinkNoise.ar(0.4);

  var tension = MouseX.kr(0.01, 0.1);

  var loss = MouseY.kr(0.999999, 0.999, 1);

  MembraneCircle.ar(excitation, tension, loss);

}.play;

)

More info

These UGens are by Alex McLean (c) 2008.

My stuff is here:

• http://doc.gold.ac.uk/~ma503am/

I also recommend the following thesis:

• The Physical Modelling of Drums Using Digital Waveguides. JA Laird, University of Bristol - 2001 - University of Bristol

this book:

• Real Sound Synthesis for Interactive Applications, Perry R. Cook http://books.google.co.uk/books?id=20p7Jg_ZdkMC

and these websites:

• http://ccrma.stanford.edu/~jos/wg.html
• http://www-ccrma.stanford.edu/~be/drum/drum.htm