MP3 Decoder Board with Display Radio Amplifier Modified USB Player TF Audio Board, Electronic Components, Bluetooth, Computer, Integrated Circuit, Mobile Phone - China Bluetooth Speaker, Speaker | Made-in-China.com
10PCS YX6100-16S MP3 Decoder IC UART Serial Port MP3 Chip that Supports SPI Flash Memory - AliExpress
Source MP3 decoder ic chip CECL08D QFP48 on m.alibaba.com