InstruoSeashell Desktop Semi-Modular Synthesizer

Instruo Seashell

Instruo's Seashell is a compact semi-modular synthesizer that combines tactile analog hardware with deep digital control via an intuitive software interface. Designed for musicians, producers, and live performers seeking flexibility without sacrificing immediacy, Seashell integrates easily into existing setups while offering an impressive degree of customizability and sound-shaping potential. As comfortable on a crowded desk as it is in a meticulously routed modular rig, Seashell is sure to find a spot in your own personal setup.

There's something quietly poetic about Seashell's design—a kind of careful restraint that invites experimentation without demanding it. With two analog sawtooth-core VCOs, a resonant low-pass filter, and an internal wavefolder, it balances sonic purity with edge and grit. Its internal analog modulation bus, waveform routing, and parallel outputs suggest a microcosm of modular possibility—pared down but fully articulate. And beneath the surface, the software adds another dimension: total recall, high-resolution control, and a flexible modulation matrix that responds like a living system. The name Seashell feels apt: it hums with inner resonance, waiting for you to listen closer.

Seashell's practical strengths shine in both hardware and software domains. It offers USB-C audio and MIDI connectivity, a TRS MIDI input, stereo headphone/line out, and assignable CV I/O. The accompanying VST3 plug-in allows for deep software integration, with high-resolution control over analog parameters and features like custom tuning scales, internal LFOs, and macro control via a 4x4 modulation mixer. Whether you're patching live or composing in-the-box, Instruo's Seashell is a versatile hub for modern synthesis.

Seashell Features

• Standalone desktop analog semi-modular synthesizer
• Two analog sawtooth-core VCOs with internal cross-modulation
• Voltage-controlled wavefolder and resonant low-pass filter
• Software control via VST3 with total recall of analog parameters
• High-resolution (14-bit) digital control over analog circuitry
• 4x4 modulation matrix with hardware macro and MIDI learn
• Stereo line/headphone out and onboard DSP effects
• USB-C audio/MIDI and assignable CV I/O for hybrid integration