FBVC

Name: FBVC
Author: Full Bucket Music

by Full Bucket Music · Vocal Tool · KORG VC-10 vocoder emulation

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FBVC is a free emulation of the KORG VC-10 vocoder from 1978, a 20-band stereo vocoder with a built-in 64-voice tone generator as the carrier.

It adds accent bending, vibrato and a tweakable ensemble effect, can play a WAV file as the modulator, and is free.

Best for: Vocals, Keys & Synths, Sound Design. Genres: Electronic & EDM, Pop.

Keywords: free, hardware emulation, 70s, vocals, synths, keys, simple, beginner-friendly, metering, MIDI-controllable, VCA, advanced, CPU-light, drums, external sidechain, gentle, mixing, resizable UI, samples & loops, sound design, pads.

What it does

FBVC is a free software version of KORG's VC-10, a 1978 vocoder keyboard with its own tone generator. It runs as an effect: feed it a voice or other modulator and play the carrier from MIDI.

Vocoder: 20 stereo band pairs, with trims for every analysis and synthesis frequency and level, and a fixed or modulated setting per synthesis band.
Band modes: VC-10 Standard copies the original, where the top four synthesis bands only get noise; VC-10 Full Bands feeds the carrier to all 20.
Tone generator: a 64-voice sawtooth carrier across the full MIDI range (the VC-10 had 32 keys), with octave switch, velocity, attack and release, and ±12-semitone pitch bend.
Carrier and modulator: inputs 1–2 take the modulator and inputs 3–4 an external carrier; balance knobs mix tone generator, external input and white noise, and the vocoder against the dry voice.
WAV playback: load a mono or stereo WAV as the modulator, triggered from the keyboard, with a legato option.
Expression: Accent Bend moves the carrier pitch with the voice's level, three vibrato LFOs, and an ensemble with slow and fast LFO rates per side.
VCA and control: Bias, Limit and Speed tweaks for the VCA, a VU meter, 64 presets, MIDI Learn for all parameters, MTS-ESP micro-tuning and a resizable UI.

The current version is 1.1.3 (24 Nov 2024). It is a free download; the developer accepts donations.

Source: Full Bucket Music product page

When to use it

FBVC is the pick for a free, characterful vintage vocoder with its own carrier, so no extra synth or sidechain routing is needed to get started. Compared with Nectar 4, which corrects and polishes vocals, it is a pure effect for robot and talking-synth sounds. Unlike Abbey Road Reel ADT, which thickens a voice and keeps it natural, FBVC replaces the voice's tone with the carrier. Its simple sawtooth carrier and fixed 20-band design give a classic late-70s sound but fewer options than a modern vocoder with selectable carriers and band counts.

Best for: robot vocals, talking pads, vocoded synth lines and vocoding drum or WAV loops.
Genres: electronic, synth-pop, disco, funk and pop.
Look elsewhere if: you need vocal correction or de-essing (Nectar 4, Pro-DS) or a modern vocoder with many carrier and band options.
Tip: load a WAV file as the modulator to use FBVC as an instant vocoder instrument, with no microphone needed.

What producers say

Coverage is light, but the main write-up found it easy to use and gentle on CPU.

Bedroom Producers Blog called it "very easy to use" and "very CPU-friendly", and said beginners can just plug in a mic and play MIDI notes while advanced users tweak the 20 bands.
Developer reputation: the same review said Full Bucket's emulations sound "fantastic" and named its Nabla string machine a favourite.

Bedroom Producers Blog review

Where to buy

Full Bucket Music: Free

Tutorials and reviews

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