Around a year ago or so I’ve already started to look into a couple of stateful non-linear models which could be more suitable for a musical and convincing digital saturation experience. To make it even more harder, they should avoid the usual drawbacks such as huge latency or insane cpu consumption – if ever possible of course.
Meanwhile, my journey into the non-linear DSP land has made an important stopover with a first prototype implementation for such an approach, yielding a DSP core for musical harmonic distortion generation based on a stateful model. This opens the door for quite a number of interesting applications such as harmonic exciters or devices which needs convincing amp models whether thats a compressor output stage or even part of a guitar amplifier effect.
Anyhow, here is some very first food for the audio effect gourmets. As a starter I’ve prepared some creamy (sub) bass distortion to make thinks pretty much obvious to each and everyone. Note: Full-range speakers required.
As a second course we offer delicious full spectrum distortion with a filter sweep through a basic sequencer pattern. A small portion of distortion is applied on the synth itself and delay + reverb are performed afterwards. This mainly shows the absence of aliasing especially in the higher frequency department. Also subtle imaging improvements with a more “3d” sound is presented.
As a sweet, I’m strongly recommending to test its application as a nasty non-linear output stage in a compressor. In this program material based example, compression is always in but in the beginning just with a simple linear VCA implementation. After the 1st bar a second order harmonic kicks in which highly reacts to the actual program dynamics and a further overall nonlinear behaviour gets increased in four steps.
The last one is a bit subtle at first but pretty much over the top to the end. Nevertheless, I hope you’ve enjoyed todays meal here.