I am looking to have an audio file (any file format) play from some device as soon as power is applied to the device. Does anyone have any suggestions? I did come across the [MP3 Trigger board, however it’s a bit expensive and it also requires a separate signal to trigger playback. I also presume that it needs some amount of time to initialize. I can make this work, but I’m curious what other solutions are out there. Ripping apart some other off-the-shelf electronics is an option.](MP3 Trigger - WIG-13720 - SparkFun Electronics)
If wired up correctly, would this be able to just have power turned on/off in order to play/stop the mp3?