Hardware
- MCU: ESP32, specifically the ESP-WROOM-32 module
- Sound chips: YM2612, SN76489
- Storage: MicroSD
- Clock generation: 2x LTC6904
- Display: ILI9341 320x240
- Volume control: DS1807S+
- Headphone amp: TPA6111A2
- IO expander: MCP23017
- DC-DC: 2x LM2735
- Battery charge: MCP73832