Support optical and coaxial digital audio output, support sbc/aac/aptx/aptx-HD/LDAC codec.
Note: Support USB sound card at the same time, USB sound card and Bluetooth switching mode is Bluetooth priority! USB sound card parameters are 16bit/48Khz.
Function Description:
1. Using BTM525 Bluetooth module (QCC5125 Bluetooth chip)
2. The type-b interface is usb power supply, the current is greater than 500ma, and it also supports usb sound card
3. Support I2S output, pin definition and Italian digital interface PIN TO PIN
4. The board has integrated LED indicator
5. The onboard standard ipex antenna base is convenient for external antenna, and the antenna needs to be prepared by yourself
6. LED0 LED1 can be connected to an external LED, and the negative electrode of the LED is connected to the baby (already onboard, not required)
7. PLAY VOL- VOL+ can be externally connected to the button, the common terminal of the button is 3.3V, to realize the playback pause, up and down music/volume adjustment (not required)
8. Board size: same as Italian digital interface

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