♥ 大市修 ♥
PC-NSF-HifiGAN Pitch Editor

大市修于市，音符修于心

A lightweight pitch editor inspired by Melodyne, built with the JUCE framework for PC-NSF-HiFiGAN vocoder integration.

Features

• Piano roll interface for visualizing and editing pitch
• Waveform display
• YIN-based pitch detection
• Note segmentation
• Real-time audio playback
• Pitch offset editing per note
• Import/Export WAV files

Prerequisites

• CMake 3.22 or later
• C++17 compatible compiler
• JUCE framework (will be cloned as submodule)

Windows

• Visual Studio 2019 or later with C++ workload
• Windows SDK

macOS

• Xcode with command line tools

Linux

• GCC or Clang
• ALSA development libraries

Building

1. Clone JUCE

First, clone the JUCE framework into the project directory:

cd pitch_editor_juce
git clone https://github.com/juce-framework/JUCE.git

2. Configure and Build

Windows (Visual Studio)

mkdir build
cd build
cmake -G "Visual Studio 17 2022" -A x64 ..
cmake --build . --config Release

macOS / Linux

mkdir build
cd build
cmake ..
cmake --build . --config Release

3. Run

The executable will be in build/PitchEditor_artefacts/Release/ (or similar path depending on platform).

Project Structure

pitch_editor_juce/
├── CMakeLists.txt              # Build configuration
├── Source/
│   ├── Main.cpp                # Application entry point
│   ├── Audio/
│   │   ├── AudioEngine.h/cpp   # Audio playback engine
│   │   ├── PitchDetector.h/cpp # YIN pitch detection
│   │   └── Vocoder.h/cpp       # Vocoder wrapper (placeholder)
│   ├── Models/
│   │   ├── Note.h/cpp          # Note representation
│   │   └── Project.h/cpp       # Project container
│   ├── UI/
│   │   ├── MainComponent.h/cpp # Main application component
│   │   ├── PianoRollComponent.h/cpp
│   │   ├── WaveformComponent.h/cpp
│   │   ├── ToolbarComponent.h/cpp
│   │   └── ParameterPanel.h/cpp
│   └── Utils/
│       ├── Constants.h         # Audio constants
│       └── MelSpectrogram.h/cpp
└── JUCE/                       # JUCE framework (clone here)

Usage

1. Open File: Click "Open" to load a WAV/MP3/FLAC file
2. View: Use mouse wheel to scroll, Ctrl+wheel to zoom
3. Edit: Click and drag notes to adjust pitch offset
4. Playback: Use Play/Pause/Stop buttons
5. Export: Click "Export" to save the modified audio

Keyboard Shortcuts

• Space: Play/Pause
• Ctrl+O: Open file
• Ctrl+S: Export file
• Ctrl+Mouse Wheel: Zoom
• Shift+Mouse Wheel: Scroll vertically

License

This project is part of the PC-NSF-HiFiGAN vocoder demo.