Welcome to the Forbidden Planet, an all analogue multi-mode filter design influenced by the 1975 Steiner-Parker Synthacon model. Control the Forbidden Planet manually or through CV and take the sound of your Eurorack into new orbits.

Forbidden Planet has three filter input jacks: High Pass, Low Pass and Band Pass. The High Pass section is this module's signature sound - a crisp sharp-cut with no residue, designed to add High Pass filtering capability to Tiptop Audio's wide range of Eurorack modules. Send a throbbing kick drum through the High Pass section and filter out the rumbling lows while maintaining the pulse of the beat. The Bandpass is clear and useful in isolating a pie-slice-range-of-frequencies while cutting off the low and highs, great for accurate sound design or sculpting audio into that sweet spot. The Low Pass is an airy classic 12db two-pole analogue slope ideal for monophonic synth patches and filtering down to the essential low-end bass we all love.

The Forbidden Planet Resonance utilizes an internal feedback path which can sound smooth or aggressive depending on the knob setting. At a low setting, it emphasizes the cut-off harmonics, at middle settings it begins to self-oscillate, and towards maximum setting it forms interesting tones and all sorts of chopped grainy bits of self-oscillation perfect for entering into a sci-fi world.

The Forbidden Planet is an impressive multi-mode analogue filter which adds a broader filter spectrum to the Tiptop Audio modular family and unlocks forbidden creative possibilities in a small package.