https://github.com/copych/sf2_sampler
ESP32-S3 SF2 based synthesizer. Parses SF2 file and loads sample data into PSRAM. Effects chain.
https://github.com/copych/sf2_sampler
arduino esp32 esp32-s3 esp32s3 midi midi-device sampler sf2 soundfont
Last synced: 6 days ago
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ESP32-S3 SF2 based synthesizer. Parses SF2 file and loads sample data into PSRAM. Effects chain.
- Host: GitHub
- URL: https://github.com/copych/sf2_sampler
- Owner: copych
- License: mit
- Created: 2025-05-07T12:58:49.000Z (11 days ago)
- Default Branch: main
- Last Pushed: 2025-05-11T20:07:21.000Z (6 days ago)
- Last Synced: 2025-05-12T07:00:08.059Z (6 days ago)
- Topics: arduino, esp32, esp32-s3, esp32s3, midi, midi-device, sampler, sf2, soundfont
- Language: C++
- Homepage:
- Size: 72.3 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# ESP32-S3 SF2 Sampler
An SF2 (SoundFont 2) based synthesizer designed specifically for the ESP32-S3 microcontroller. This project leverages the enhanced memory capabilities of the ESP32-S3 (with PSRAM) to efficiently load and play SoundFont samples, providing a compact and powerful sampler solution.
---
## Overview
The ESP32-S3 SF2 Sampler is a sampler firmware that runs exclusively on the ESP32-S3 variant due to its improved PSRAM and memory management compared to the original ESP32. It supports external DACs like the PCM5102 for high-quality audio output and uses the built-in USB hardware of the ESP32-S3 to function as a USB MIDI device.
---
## Features
- **SoundFont 2 (SF2) support**: Load and play SF2 sample banks.
- **USB MIDI device**: Connect directly to a computer or MIDI host via USB.
- **Audio effects**: Reverb, chorus (delay is coming)
- **External DAC support**: Compatible with PCM5102 and similar DACs.
- **Optimized for ESP32-S3**: Takes advantage of the enhanced PSRAM and memory architecture.
- **Simple hardware connections**: Minimal wiring required.
---
## Hardware Requirements
- **ESP32-S3 microcontroller** with PSRAM (OPI PSRAM recommended)
- **External DAC** (e.g., PCM5102)
- USB connection for MIDI and power
---
## Pin Connections
| Signal | GPIO Pin |
|--------|----------|
| BCK | GPIO5 |
| DTA | GPIO6 |
| WCK | GPIO7 |
---
## Software Setup
### Arduino IDE Configuration
To build and upload this project using Arduino IDE, configure the following settings:
- **PSRAM**: Select **OPI PSRAM**
- **Partition Scheme**: Choose a partition with the most available SPDIFF space
- **USB Mode**: Select **TINY USB**
- **Core Debug Level**: Set to **Info** or lower (higher debug levels may block USB functionality)
---
## Usage
1. Connect your ESP32-S3 board with PSRAM and external DAC according to the pinout above.
2. Load your preferred SF2 SoundFont files onto the device (refer to project documentation for details on loading SF2 files).
3. Connect the ESP32-S3 via USB to your computer or MIDI host.
4. The device will enumerate as a USB MIDI device, allowing you to play samples via MIDI input.
---
## Notes
- This project is **only compatible with the ESP32-S3** due to memory and PSRAM requirements.
- Using a core debug level above **Info** may interfere with USB MIDI functionality.
- Ensure your external DAC is properly powered and connected for optimal audio quality.
---
## Contributing
Contributions, issues, and feature requests are welcome! Feel free to open a pull request or issue on the GitHub repository.
---
## License
This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for details.
---
## Links
- [Project Repository](https://github.com/copych/SF2_Sampler)
- [ESP32-S3 Documentation](https://www.espressif.com/en/products/socs/esp32-s3)
- [SoundFont 2 Specification](https://en.wikipedia.org/wiki/SoundFont)
---
Enjoy your ESP32-S3 powered sampler!