Part 4
We have a working , effective template straight out of the box to work with.

So long as we ensure that the main planks of the composition remain in place it will be easy to alter and amend the resulting visualizer more to our satisfaction.

Simply go the first level of the Audio Spectrum patch, click on the Patch Creator button, type in Replicate and double click on the Replicate in Space patch listed. Now select the Iterator macro patch, Control + Click and highlight Select Upstream patches and press Command + C to copy the patches. Make sure you then disenable the Iterator patch you've just copied from.

Double click the Replicate in Space patch and press Command + V to paste these patches into the Replicate in Time patch.

Click on the Audio Spectrum in the Editor patch level bar to go up one level. Now connect the output structure from the JavaScript patch to the Audio Spectrum input on the Replicate in Space patch, turn on a Quartz Composer music visualizer in iTunes, anyone will do, and the music visualizer you have been working upon will pop into life.



You can add in new elements to the composition, such as images, primitive objects, such as cylinders, lines and spheres and explore using multiplexers to swap and change colours and images.

In the next part of the Quartz Composer tutorials we are going to take a close look at one of the pre-installed visualizers provided by Apple, namely Jelly.
Tutorial Start

For even more on programming within Quartz Composer see the JavaScript Guide or the Core Image Guide.