Two effects. An LP filter and an EQ/freq specific harmonic exciter.
Tube Radio LP is a unique low pass filter with fully adjustable cutoff AND resonance control. Sampled with dynamics! Lower input levels gives a smooth fluffy sound, higher input levels thicken the sound. Trim control provides quick and easy control over what you get. This thing demands a little more from your CPU than the Nebula stuff you’re used to, so the faster your system is, the better. It was sampled with FM transmission with a tube radio tuner picking up the signal. The filter came from a hardware VA synth. The transmitter/radio was driven just right, so that distortion would be triggered at the higher levels, but not so much with lower levels. You get a very sharp, tall resonant peak, and if you use a hot signal it will trigger strong harmonics! This effect was inspired by some very cool modular synth hardware made by an innovative company that uses old tube radio tubes in all of their stuff. There are 5 and 10k versions, and the 10k version is subject to this disclaimer.
2nd effect- Tube Radio EQ, is completely unique in the Nebula world. It’s a frequency specific distortion/harmonic exciter tool, that doubles as an EQ and also has sampled dynamic behavior. The same tube radio tuner (as with the LP) was used in it’s design to provide the harmonics. Basically, everything is dry except for the area you define when you position the ‘radio band’ somewhere in the spectrum. There are 3 separate modules. Low module has the radio band taking the shape of a low shelf filter. Mid module’s radio band is shaped like a peak filter. High module’s band is like a high shelf. You can use these as an EQ band and boost or cut, but the main idea is that you will get harmonics generated by the radio band, and only by it. You have a width control to help define the area that will create distortion. You have a trim control again, to quickly decide how hot to drive the effect, and determine how the harmonics/distortion will come out.
You get a lot of control with this, and can use it in many ways. One cool example- you can pick a spot in the spectrum and cut it some, but then compensate for that cut by boosting the harmonics by about the same amount as your cut. The result is that you suck out some of the fundamental sound in that particular frequency range, but replace it with harmonics generated by that range. This thing is custom made and only exists in Nebula.