DCO6

6-voice polyphonic VST3 synthesizer with 4-pole ladder filter, BBD stereo chorus, independent amplitude and filter ADSRs, LFO with delay, 3-band EQ, and FFT spectrum analyzer. Built from scratch in JUCE/C++.

This is beta software. It will keep improving.

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Download (no build required)

Grab the binaries from Releases:

• DCO6 v1.1.vst3 - load in any VST3-compatible DAW (Ableton, Reaper, FL Studio, etc.)
• DCO6 v1.1.exe - standalone, runs without a DAW

For the VST3: copy the DCO6 v1.1.vst3 folder to C:\Program Files\Common Files\VST3\ and rescan plugins in your DAW.

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Features

• 6-voice polyphony with polyBLEP anti-aliasing
• 4-pole Moog-style ladder filter (Huovilainen model)
• BBD stereo chorus (Mode I and II)
• LFO with delay, stereo ping-pong delay, reverb
• Independent amplitude and filter ADSRs
• 3-band EQ (low shelf 200Hz, peak 1kHz, high shelf 5kHz)
• Real-time FFT spectrum analyzer
• Light and neon skin (switchable inside the plugin)
• 8 pad presets included

MIDI CC Mapping

Knobs:

CC	Parameter
74	VCF Cutoff
71	VCF Resonance
76	VCF Env Amount
77	DCO PWM
78	LFO Rate
84	LFO Delay
86	Delay Mix
87	Reverb Mix
88	DCO LFO Pitch

Faders:

CC	Parameter
73	Filter Env Attack
75	Filter Env Decay
79	Filter Env Sustain
72	Filter Env Release
80	Amp Env Attack
81	Amp Env Decay
82	Amp Env Sustain
83	Amp Env Release
85	Volume

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Building from source

Requirements

• Windows 10/11 x64
• Visual Studio 2022 Build Tools with "Desktop development with C++"
• CMake 3.22+
• Git

JUCE is downloaded automatically on first build (via CMake FetchContent, needs internet).

Steps

git clone https://github.com/jesusemans/DCO6.git
cd DCO6
build.bat

The script configures CMake, builds in Release mode, and auto-installs the VST3 to C:\Program Files\Common Files\VST3\. First build takes 5-10 minutes.

Versioning

To release a new version (e.g. v1.2), change these two lines in CMakeLists.txt:

set(DCO6_VERSION "1.2")
set(DCO6_CODE    "D612")

And in build.bat:

set VERSION=1.2

The 4-char plugin code must be unique per version so DAWs treat them as separate plugins.

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License

This project is provided as-is. No warranty. Use at your own risk.