Looking at the Eowave Fluctuations Magnétiques you quite quickly realize that this module has a lot of functionality to offer that you wouldn’t usually expect in a filter module. By offering four identical multimode-filters and numerous ways to sync and route, you have a big sonic playground right at your fingertips.

The Eowave FM is composed of four filters arranged in pairs (A/B and C/D). The circuits feature high-pass, band-pass and low-pass modes with a slope of -12 dB per octave. Routing options allow serial or parallel operation. Level potentiometers at the input stages make it possible to generate asymmetrical distortion, which really expands the palette of possible sounds. By connecting several of the VCFs in series, users can create filter types with a slope of up to -48 dB per octave. For modulations, there are several CV inputs.


The basic character of the module is gentle and very musical. However, with high input level settings, it is also possible to achieve beefy, rather rough results. The circuits can’t self-oscillate, unless the user patches a feedback loop, but it is possible to ping the filters for some very nice percussive sounds, some f them can be heard in the video below. In this video we explore various scenarios, from classic filter duties to fourfold filter pings!