Audio Synthesis with CHOPs in Houdini

Creating a very simple flute like audio synthesis with the CHOPs context in houdini. CHOPs stands for CHannel OPerators, and allows us to look at time varying data, and manipulate it.

In this case, the original audio signal is just a triangle wave, which gets modulated against an envelope, giving us a nice attack, sustain and falloff.

Waveforms from top to bottom:
Final audio waveform being played to speakers
The 2nd purple line is the ADSR envelope generated by the trigger chop.
The solid yellow bar is the triangle wave
The light purple square wave is the input into the Trigger CHOP, that generates the envelope train. The pulse width controls the sustain of the envelopes generated, so a series of peaks would not have any sustain at all.

Houdini - much more than just a 3D application. It's a visual operating operating system.

Blog post here:
http://wolfbrother.blogspot.com/2011/12/audio-synthesis-in-houdini.html

Category:

Film & Animation

Tags:

• houdini
• chops
• audio
• synthesis