Doepfer A-104 Quad Resonance Filter

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Doepfer A-104 Quad Resonance Filter The Doepfer A-104 is a quad bandpass filter based on the filter circuitry found in classic vintage vocoders. It features four parallel fixed-fre quency bandpass filters, each with its own volume control, allowing you to emphasize specific frequency bands for sculpting formant-like textures, harmonically rich drones, or noise-based timbres. This module excels at shaping sound in creative and expressive ways. Whether you're processing noise, pads, or complex audio sources, the A-104 adds depth and spectral character to any Eurorack system. Key Features: 4 parallel fixed bandpass filters Inspired by classic analog vocoder circuits Individual volume control per band Ideal for formant shaping, texture layering, and timbral coloration Great for experimental, vocal-like, and noise-driven sound design Show more