Last time around we got our feet wet with SuperColliderAU, working our way through some example code and building a simple Audio Unit plug-in from scratch. This time we’re going to attempt something a little bit more ambitious: designing, prototyping and building a full blown tremolo audio effect plug-in. We won’t be taking the straight ‘do this then do that’ tutorial approach, however: our focus will be on process and tools as much as on actual building, and we’ll begin quite simply by imagining how to go about creating a tremolo effect. Then we’ll construct a suitable algorithm through trial and error, testing our ideas along the way using SuperCollider’s graph-plotting capabilities.