Eowave - Magnetosphère
The Eowave Magnetosphère is a discrete 4-Pole transistor-based Low Pass filter.
Its rather unique warm sound is heavily dependent on input gain and can go from clean and gentle through various stages of saturation into distortion, with the audio input and the cutoff frequency interacting heavily. It can self-oscillate with a clear sine wave.
In this video, we use it to filter chords in the first example, showing its saturation capability and the characteristic of the resonance. Afterwards we demonstrate filter sweeps with a sawtooth wave, and filter pings.