MP3 based on AC6925a

I am a junior high school student, and this is my first project!
I have been modifying this project (maybe it doesn’t deserve to be called a project) since I got started, and it has been modified for a year and a half.
Isolated audio
 
function:
Play audio files stored in sd (tf).
Play via Bluetooth devices (such as mobile phones, computers, etc.).
This module supports up to Bluetooth 5.1
FM: PIN21 does not lead to an antenna, so chips with this function cannot Works
through 3.5mm (PJ-320b) audio interface output
 
IC application:
AC6925a decoding
TP4057 power management
 
Note: Some sellers of AC6925a may not have a default program, please purchase an IC with a program (or burn it yourself)
 
This PCB has not been verified, wait for me If you have money, verify it again, but the previous version has been verified. If you are not short of money, you can try it.
The cost is about 20 yuan.
 
 
The main member is of course ryusbgnjsdf.
 
 
Yes. . . The picture below is an early version of the pcb and schematic diagram. You need to open it to see the details.