Moog Spectravox Semi-Modular Analog Spectral Processor Now Available

Ahead of Superbooth 2024, Moog Music has introduced the Spectravox Semi-Modular Analog Spectral Processor, an all-in-one synth voice and vocoder and the company’s fourth device in the Mother-32 Eurorack format.

The Moog Spectravox is an analog spectral processor based around a 10-band filter bank. Spectravox can create lively drones and colorful tonal sweeps on its own, or add resonant depth and “psychedelic spectral movement” to any external sound. Connect a microphone, and Spectravox becomes a 10-band analog vocoder, with innovative integrated modulation of all of its filters.

The Spectravox was originally introduced as the Engineering Workshop project at Moogfest 2019. A key difference in the updated design is that the sliders of the original have been swapped for a row of pots, making room for additional patch points.

Here’s what they have to say about the Spectravox:

“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 multicolored 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.

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.

Spectravox uses the pioneering vocoding work of Bob Moog and Wendy Carlos in the late 1960s as its inspiration—work which was based on Homer Dudley’s original designs from the 1930s and which 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. With the ability to emphasize vowel sounds via the Hiss and Buzz functionality of the Moog 16 Channel Vocoder, Spectravox is both a major step forward for analog filter banks and a loving exploration of early music technology history.
Scramble the Frequency Spectrum

Scramble the frequency spectrum and create wonderfully unpredictable textures with patch points for each filter in the filter bank and included 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 with an extensive patch bay providing control over almost all of its parameters. Spectravox is a boundary-pushing instrument that invites you to explore creative new ways of shaping and sculpting sound.

Here’s Moog’s official demo, a musical performance featuring Jamie Lidell‘s Awake and Alive, an original composition showcasing the Moog Spectravox. The performance also features Aaron Steele on percussion and Luke Schneider on pedal steel.


  • 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.

Spectravox Demo Videos:

Pricing and Availability:

The Moog Spectravox is available now for $599 USD.

3 thoughts on “Moog Spectravox Semi-Modular Analog Spectral Processor Now Available

  1. I was surprised to find that I really enjoyed the song and ended up listening the whole way through. Might even listen again later today.

    I can imagine having a lot of fun with the Spectravox in a semi-modular environment.

    But here they’re using the Spectravox as outboard on multiple instruments and it all sounds good together. What I’d love to see is a behind the scenes. How did it work? Do they have loads of Spectravoxes, one on each channel? Or would you record through one at a time? Would you do vocal riding in the DAW and then put it out to the Spectravox afterwards? Do you have to keep re-recording the Spectravox bit when you realize the frequencies aren’t quite sitting well in the mix or do you tame with eq? I can’t help thinking that this might be a nightmare, and that this sort of effects processing is usually done in-the-box now, which is much easier.

  2. Dear Moog:

    You have loads of space on that panel. Why the hell are you using those terrible trimpots? why are you breaking convention with all of your other products in this form factor and putting the jacks on the bottom *and* on the side (*facepalm*)? Why do you choose to keep making instruments that provoke so much ambivalence when you are so close to getting it so right?

    Does bad UI in synth design drive anyone else crazy? Because it’s endemic (looking at you, eurorack) and it really needs to stop!

    I don’t think I’m alone in this sentiment, but I would most likely own at least a DFAM and a Subharmonicon by now if they had real potentiometers for every parameter. It’s a cost savings of what, $1-2 per pot, and that’s if purchased in small quantities? So what’s your excuse?

    Also, yes, that song is way above par. What a pleasant surprise. Even though all I truly want is cosmic Lisa Bella Donna Berlin school odysseys forever…

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