I use it as a standalone mp3 player, works great. I would like to have a random play function. I use it like listening to a great FM radio station that always plays the music you like and has no commercials.
alan
MOD-MP3-X-LITE can not work in stand-alone mode. It lacks a main microcontroller.
MOD-MP3-X can work in stand-alone mode since it has STM32F103 on-board. The firmware of STM32F103 can be modified via ARM JTAG tool. The random function can be added if you modify the firmware, and specifically mp3PlayerTask.c and if you add a command to switch between random mode and regular mode, you'd also have to add it in uartUserInterface.c and uartUserInterface.h.