Features
- Sipeed Longan Nano: 128KB Flash/32KB SRAM
- ES9023 24bit I2S Audio DAC
- exFAT MicroSD (up to 512GB)
- 44.1KHz 16bit Stereo WAV File
- Tag information by LIST chunk in WAV File
- Cover Art display by RGB565 binary format file
- Folder/File navigation by ASCII order
- Control by Android Headphone button (3 buttons)
- Volume by utilizing DAC 24bit range for playing 16bit Audio data
- Album unit random play by time out after play finish (Assuming [Artist Folder]/[Album Folder] structure)
- Resume playback
- Battery voltage check (Optional: external circuit needed)