Sine32 is a MIDI-enabled sine wave synthesizer, powered by an ESP32. It is controllable over serial and can be used with any device capable of:

• Establishing a serial connection
• Running python code
• Running loopMIDI or similar virtual MIDI routing software

• ESP32 development board
• A speaker
• Arduino IDE (recommended) or ESP-IDF environment for flashing
• loopMIDI (or equivalent virtual MIDI routing software)
• Python 3.12 runtime (other versions may work but are untested)

1. Clone this repo:

   git clone https://github.com/pattycoder01/sine32.git

2. Flash the sine32.ino sketch onto the esp32
3. Connect a speaker to GPIO25 and GND on the ESP32

1. Connect your ESP32 with installed firmware and connected speaker
2. Start loopMIDI and create a new virtual port if necessary
3. Start the Sine32_controller.py script using python
4. Set the MIDI Input Port field to your loopMIDI port
5. Set the Serial Port field to the Serial Port of your ESP32 (usually there's only one; if not, try available ports until the ESP32 responds)
6. Press the Start button
7. Send MIDI data to the loopMIDI port from your DAW or any software that supports MIDI output

• MIDI Input Port: Select the MIDI input device you'd like to use — typically your loopMIDI port, but this can also be a hardware MIDI keyboard
• Serial Port: The COM port your ESP32 is connected to. If multiple ports are shown, try each until the ESP32 responds
• Baudrate: The speed at which tone data is sent via serial. Default is 115200 — only change this if you've modified the firmware to use a different baud rate
• Transposition: The number of semitones to shift incoming MIDI notes up or down
• Controls:
  • Start - Begins streaming MIDI data over serial to the ESP32
  • Stop - Stops MIDI data transmission. Note: This does not stop any currently playing tones - press the ESP32’s reset button if needed
  • Refresh - Re-scans available MIDI and serial ports. Use this if you plug in a new device after launching the software

A virtual MIDI port is required to connect your DAW to the controller. We recommend using loopMIDI on Windows.

This project is licensed under the terms of the GNU General Public License v3.0.