An 8-bit synthesizer using atmega8515 with 4 operating modes.

1. Piano mode: Play like a simple piano using the buttons.

2. Music mode: Listen to already downloaded melodies.

3. Load mode: You can download a melody via UART using a terminal (for example PUTTY).
   The melody is loaded using the entered keys. If you have notes for a melody, you can convert it to the right keys using melody_converter.py.

4. PC mode: You can play the piano, using your PC keybord. Just connect via UART using a terminal (for example PUTTY).