Sound Analyzer in Quartz Composer

[j_apopo]

Hi,
yesterday I tried to make some audio visualization not by midi, but by frequency analysis.
I used the spectrum of the Audio Input and made some parameters variations of a shape.
Then, the problem is that the spectrum give so many values, and they are not stable at all, they change so fast that the shape looks like "nervous".
Also if you download of the many tutorials of how to make a sound spectrum, or frequency analysis, you can see that the bars are never really still, i mean they continue to move also if you send the auido by line in. Thats cause the spectrum gives so many values and they change so fast.

Someone know how to fix that?

Thank you
jaco

[Scratchpole]

Use a Smooth.
Starting to get these things the way I want:

Vimeo Videos
Vimeo Clip 10007034

This composition may help, it's set up to run as an itunes visualiser but open it up in qtz and change the protocol, add an audio input and should be easy enough to study the guts, smoothing maths. http://kineme.net/composition/Scratchpole/3DEQ

[asterix]

You should also investigate sin and saw waves. Use audio->smoother input in your frequency. You may need to multiply it up or down to get it to synch nicely. This is a good method for applying rotations, bounces etc. Anything repetitive and cyclical.