Moog Spectravox Semi-Modular Analog Spectral Processor

Spectravox is not just an instrument; it’s a portal into uncharted sonic realms. It offers lively drones and colourful tonal sweeps that breathe life into any sound composition. At its core, is a visionary 10-band filter bank, paired with a robust analog oscillator and a dynamic white noise generator.


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MOOG Spectravox Semi-Modular Analog Spectral Processor

The Newest Member of the Moog Family

Spectravox, the newest member of the Moog semi-modular family, is a groundbreaking tool for sculpting sound. An analog spectral processor based around a 10-band filter bank, Spectravox creates lively drones and colourful tonal sweeps on its own and adds resonant depth and psychedelic spectral movement to any external sound. Hook up a microphone and Spectravox becomes a 10-band analog vocoder with innovative integrated modulation of all of its filters.

In fact, Spectravox is an exploration and expansion of the topology of the vocoder and filter bank. Also, it’s a highly flexible instrument and signal processor with a comprehensive patch bay for integration into studios of all sizes.

A Groundbreaking Tool for Sculpting Sound

Synthesists have delighted in playing with the spectrum of sound since the Moog 907 Fixed Filter Bank appeared in the 1960s, creating lush vowel tones and multicoloured timbral animation with hands-on level control of each frequency band of a sound.

Unlike earlier fixed filter banks, however, the unique filters of Spectravox are no longer fixed in place and will jointly shift around the frequency space, allowing for the creation of otherworldly voltage-controlled spectral animation and vibrant phaser-like sweeps.

With 10 filters whose variable resonance can morph from soft precision to shimmering choral effects, Spectravox reshapes the sounds you love into surprising new forms and brings a new world of sonic possibilities to your studio.

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10-Band Analog Vocoder

Spectravox is a fascinating standalone sculptable synthesizer voice thanks to its built-in carrier sound source of a thick analog Moog oscillator and white noise generator. With its combo XLR/jack program input, Spectravox becomes a fully featured 10-band vocoder with a secondary filter bank for analyzing the spectral makeup of incoming sounds.

In VOCODER mode its 10 analysis filters map the timbral characteristics of any external sound onto any other sound you can imagine. Shape the warm analog oscillator of Spectravox with the dynamics of your voice, or use a drum machine to animate guitar chords in a mesmerizing broadband percussive space.

Electronic Instruments for the Musician

Spectravox uses the pioneering vocoding work of Bob Moog and Wendy Carlos in the late 1960s as its inspiration. This work was based on Homer Dudley’s original designs from the 1930s. It was used to prominent effect in Stanley Kubrick’s 1972 film A Clockwork Orange.

Innovating further from these early designs, Spectravox uses 10 state-variable filters for its filter bank. All 10 of which are capable of being shifted with its internal triangle wave LFO or external control voltage.

Spectravox is both a major step forward for analog filter banks and a loving exploration of early music technology history. This is thanks to its ability to emphasize vowel sounds. It does so via the Hiss and Buzz functionality of the Moog 16 Channel Vocoder.

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Scramble the Frequency Spectrum

Scramble the frequency spectrum and create wonderfully unpredictable textures. It’s easy with patch points for each filter in the filter bank and includes patch cables. Add analog warmth and subtle phasing to digital synthesizers and sound sources. Integrate Spectravox with other Moog semi-modular instruments or Eurorack modules. This is possible with the extensive patch bay providing control over almost all of its parameters.

Lastly, Spectravox is a boundary-pushing instrument that invites you to explore creative new ways of shaping and sculpting sound.

Spectravox Key Highlights:

  • Semi-Modular Design
  • Dynamic 10-Band Filter Bank
  • Extensive Connectivity
  • Innovative Modulation


  • Semi-Modular Design: No patching is required to start, allowing immediate musical exploration.
  • Dynamic 10-Band Filter Bank: Shift and shape frequencies to create everything from rich basses to ethereal pads.
  • Extensive Connectivity: Integrate seamlessly with other Moog semi-modular instruments, Eurorack modules, and external sound sources.
  • Innovative Modulation: Internal triangle wave LFO and external CV options for real-time control over filter movement and sonic texture.

SOUND SOURCE: VCO, White Noise Generator

FILTER: 10x variable resonance voltage-controlled filters: 1 Low-Pass Filter 8 Bandpass Filters 1 High-pass Filter


ANALYSIS ENGINE SOURCES: Ext. Input via 1/4″ / XLR combo jack or 3.5mm jack with preamplifier. XLR input supports dynamic mics.

PATCHBAY JACKS: 36 x 3.5mm

INPUTS: 19 Input Jacks

OUTPUTS: 17 Output Jacks

AUDIO OUT: 1⁄4” TRS Headphone or 1⁄4” TS Instrument

SECURITY: Kensington lock slot

POWER SUPPLY: Wall adapter; barrel connection; center-pin positive INPUT: 100 – 240VAC; 50 Hz – 60 Hz OUTPUT: +12VDC; 2.0A


EURORACK CURRENT DRAW: 450mA (maximum) from +12VDC (10-pin header)

MOUNTING DIMENSIONS: 60HP (1.5” Module Depth)

For more information, please visit the manufacturer's website.