UltraFastMidiRenderer

A high-performance MIDI to audio renderer written in Rust, optimized for speed and efficiency using SIMD and parallel processing.

日本語版はこちら (Japanese version)

Warning

Alpha Version: This software is currently in an alpha state. You may encounter bugs or unexpected behavior.

Features

• Extreme Performance: Optimized rendering engine utilizing SIMD (Single Instruction, Multiple Data) and multi-core parallel processing via Rayon.
• SoundFont Support: Supports both SF2 and SFZ formats.
• MIDI Analysis: Built-in fast MIDI analysis tool to visualize note distribution, track counts, and estimated polyphony.
• Streaming Engine: Efficient memory usage by streaming MIDI data and pre-loading samples.
• Batch Processing: Convert multiple MIDI files simultaneously.
• Built-in Limiter: High-quality look-ahead limiter to prevent clipping and ensure consistent output levels.
• Modern GUI: Intuitive interface built with egui, featuring real-time system monitoring (CPU/Memory) and taskbar progress integration (Windows).
• Flexible Export: Supports multiple output formats including WAV, MP3, OGG, FLAC, and M4A (via FFmpeg).
• Customizable Output: Wildcard support for dynamic filename templates (e.g., {name}, {notes}, {duration}).

Limitations (Alpha)

• Basic MIDI Support: Currently focuses on high-speed rendering and does not support advanced MIDI events such as Pitch Bend, Modulation, or Expression. Only Note On/Off and Velocity events are processed.
• Stability: As an alpha version, stability is not guaranteed. Please back up important data before use.

Tech Stack

• Language: Rust
• GUI Framework: egui / eframe
• Audio Engine: Custom SIMD-optimized renderer using components from rustysynth and midly.
• Parallelism: rayon
• Audio I/O: hound, cpal, memmap2

Requirements

• Rust: Latest stable version.
• FFmpeg (Optional): Required for non-WAV export formats (MP3, OGG, etc.). Must be in your system PATH.

Build and Run

To build and run the application:

cargo run --release

The application is highly optimized in --release mode. It is recommended to use release builds for production rendering.

Usage

1. Add SoundFonts: Click "Add Source" to load your SF2 or SFZ files.
2. Add MIDI: Drag and drop or click "Add MIDI" to select files.
3. Configure Settings: Adjust volume, limiter settings, and output format in "Audio Settings".
4. Render: Click "Start Rendering" to begin the process.

License

MIT License