Modular Voice Studio

Next-Generation Real-Time Modular Vocal Processing Suite, Multi-Channel Hardware Mixer & 3D Spatial Audio Engine

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🌟 Overview

Modular Voice Studio is an open-source, ultra-low-latency, multi-channel vocal processing and audio routing suite engineered specifically for streamers, voiceover artists, podcasters, broadcast engineers, content creators, and audio purists.

Powered by a high-performance C++20 / JUCE 8 DSP Core and a modern .NET 8 / Avalonia 11 desktop GUI, Modular Voice Studio combines:

1. A Modular Node-Based DSP Canvas with 25+ studio modules.
2. A Hardware Channel Strip Mixer for direct mic, virtual VB-Cable output, and zero-latency headphone monitoring.
3. A Dynamic Serial Effect Rack with live VST3 plugin hosting and creative vocal transformations.

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🚀 Key Features

• 🎛️ Dual-Architecture Desktop Application:
  • C# / Avalonia 11 Frontend: Ultra-responsive, GPU-accelerated hardware mixer UI styled with neutral dark studio aesthetics.
  • C++20 Hybrid DSP Core (ModularVoiceStudio_Core.dll): Real-time thread-safe audio engine with double-precision floating-point calculation.
• 🎙️ Live Multi-Bus Channel Routing:
  • Mic Input: Zero-latency hardware microphone capture.
  • VB-Cable Output (Bus B1): Streams processed broadcast voice directly to Discord, OBS Studio, Zoom, Skype, and games.
  • Headphone Monitor (Bus A1): Dedicated low-latency headphone monitoring with zero double-voice/comb-filter artifacts.
• ⚡ Ultra-Low Latency Engine:
  • Optimized buffer sizing (128 / 256 samples, ~2.6 ms).
  • Real-time granular pitch shifting with sub-7ms lookback windows and zero-shift bypass.
• 📦 Dynamic Serial Effect Rack:
  • Real-time serial insert processing with smooth Wet/Dry blend faders (lowering fader dials down effect intensity without muting the dry voice).
  • Fast bypass, solo, mute, and live stereo VU metering per strip.
• 🔌 Universal 64-Bit VST3 Plugin Hosting:
  • Automated system-wide VST3 directory scanner (C:\Program Files\Common Files\VST3, VSTPlugins, etc.).
  • Direct file loading and native GUI window hosting for third-party plugins (Valhalla, FabFilter, iZotope, etc.).
• 🧠 Studio Modular Canvas:
  • Full node graph editor with 25+ built-in DSP processors (7-Band Parametric EQ, LR4 Crossover, Dynamic De-Esser, 3D Spatial Realm, Broadcast Mic Modeling, Compressor, OTT, Limiter, etc.).
• 🔤 Clean Embedded Typography:
  • Embedded Inter font family with Helvetica fallbacks for razor-sharp rendering on all high-DPI screens.

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🎛️ Effect Rack & Creative Vocal FX

Effect Module	Description	Key Features
Pitch Shifter	Studio Vocal Pitch & Formant Shifter	Octave shift (±24 st), Fine tune (±100 ct), Formant timbre/gender shift (±12 st), ultra-low latency grain tracking
Studio Reverb	Acoustic Space Simulator	Room size, high-frequency damping, stereo width, wet/dry blend
Echo Delay	Stereo Ping-Pong & Feedback Delay	Millisecond sync, feedback resonance, stereo cross-channel ping-pong
Robot Voice	Sci-Fi Ring Modulator & Bitcrusher	Modulation rate, depth, sample-rate crushing, lo-fi bit reduction
Vocal Doubler	Psychoacoustic Stereo Chorus	Micro-pitch detune, stereo Haas spatial widening, vocal thickening
Analog Saturation	Tube & Tape Harmonic Warmer	Soft-clipping drive, odd/even tube warmth, asymmetrical tape curves
VST3 Host	64-Bit External Plugin Rack	Hosts any external VST3 audio effect with full editor window and parameter automation

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🏛️ System Architecture

                       ┌──────────────────────────────────────────────┐
                       │           Hardware Microphone Input          │
                       └──────────────────────┬───────────────────────┘
                                              │
                                              ▼
                       ┌──────────────────────────────────────────────┐
                       │     Modular Voice Studio (C++ Core DSP)      │
                       │ ┌──────────────────────────────────────────┐ │
                       │ │   Modular DSP Canvas / Pre-Processing    │ │
                       │ └────────────────────┬─────────────────────┘ │
                       │                      │                       │
                       │                      ▼                       │
                       │ ┌──────────────────────────────────────────┐ │
                       │ │        Dynamic Serial Effect Rack        │ │
                       │ │  [Pitch Shift] ➔ [Reverb] ➔ [VST3 FX]   │ │
                       │ └────────────────────┬─────────────────────┘ │
                       └──────────────────────┼───────────────────────┘
                                              │
                       ┌──────────────────────┴───────────────────────┐
                       │                                              │
                       ▼                                              ▼
        ┌─────────────────────────────┐                ┌─────────────────────────────┐
        │  Bus B1: VB-Cable Output    │                │  Bus A1: Headphone Monitor  │
        │  (Discord, OBS, Games)      │                │  (Zero-Latency Live Audio)  │
        └─────────────────────────────┘                └─────────────────────────────┘

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💻 Tech Stack

• Core Audio & DSP: C++20 standard, JUCE 8 framework (AudioDeviceManager, APVTS, VST3 Hosting).
• Desktop Application Frontend: C# / .NET 8.0, Avalonia UI 11.2 (Cross-platform XAML vector GUI).
• Interoperability Layer: High-speed C-ABI Native Export (MVS_Core_Export.cpp / NativeBridge.cs).
• Typography: Inter Font (SIL Open Font License 1.1) with Helvetica fallback.
• Build System: CMake 3.22+, MSBuild / Visual Studio 2022+, dotnet CLI.

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🔧 Building from Source

Prerequisites

1. Windows 10 / 11 (64-bit)
2. Visual Studio 2022 or Visual Studio 2026 (with Desktop development with C++)
3. .NET 8.0 SDK
4. CMake 3.22+
5. Git

Step 1: Clone Repository

git clone --recursive https://github.com/muzmahil/Modular-Voice-Studio.git
cd Modular-Voice-Studio

Step 2: Build C++ Core Engine & Plugins

# Configure CMake
cmake -B build -G "Visual Studio 18 2026" -A x64

# Build ModularVoiceStudio_Core DLL and VST targets
cmake --build build --config Release --parallel

Step 3: Build Standalone C# Application

# Copy Core DLL to Standalone output directory
copy build\Release\ModularVoiceStudio_Core.dll Standalone\bin\Release\net8.0-windows\

# Build Standalone App
dotnet build Standalone/ModularVoiceStudio.App.csproj -c Release

Step 4: Run Application

.\Standalone\bin\Release\net8.0-windows\ModularVoiceStudio.exe

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📦 Building Installer Package

To generate a standalone setup installer executable:

# Run the automated packaging script
.\Build-Installer.ps1

The output setup bundle will be generated in dist/ModularVoiceStudio_Setup.exe.

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📄 License & Attributions

This project is licensed under the GNU General Public License v3.0 (GPLv3) - see the LICENSE file for details.

Third-Party Libraries:

• JUCE Framework: Copyright (c) Raw Material Software / PACE Anti-Piracy Inc. - Licensed under GPLv3 / Commercial.
• Avalonia UI: Copyright (c) AvaloniaUI OÜ - Licensed under MIT.
• RNNoise: Copyright (c) 2017 Mozilla, Xiph.Org Foundation, Jean-Marc Valin - Licensed under BSD 3-Clause.
• Inter Font: Copyright (c) 2016-2024 Rasmus Andersson - Licensed under SIL Open Font License 1.1.