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For a prototype, I need to use a MP3 player that meet these requirements:

  • Loops a .mp3 file forever when turned on
  • Can be plugged into a wall (no need to replace batteries)
  • Have a 3.5mm or 6.35mm audio output
  • If possible starts playing as soon as I plug it into the wall i.e no need to press the play button, select a playlist to play, etc

I thought of purchasing one of these old MP3 devices:

But I'm not sure it meets all of the above conditions

EDIT: Reason we need this: We have a device that streams audio to a hearing aid. This device shutsdown in 5 minutes if there is no audio i.e muted. But we have a specific case where we need it to be on forever, so we thought of a mp3 player that loops an audio file of 4m30s with a little beep at the end just to stimulate the streamer to stay on

Any recommendations?  

Thank you!

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  • What are you using this player for exactly? I understand you want to play a song, but where/why is it being installed?
    – JMY1000
    Jan 17, 2020 at 7:36
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    Arduino Uno / ATMEGA328P with an MP3 player module perhaps
    – towe
    Jan 17, 2020 at 10:34
  • @JMY1000 We have a device that streams audio to a hearing aid. This device shutsdown in 5 minutes if there is no audio i.e muted. But we have a specific case where we need it to be on forever, so we thought of a mp3 player that loops an audio file of 4m30s with a little beep at the end just to stimulate the streamer to stay on.
    – RA828
    Jan 17, 2020 at 11:22
  • @towe Good idea! I loop the audio through code, it starts playing as soon as it is plugged in and the MP3 player module goes to a 3.5mm output module. Anything I'm missing?
    – RA828
    Jan 17, 2020 at 11:41
  • Don't think so. The normal breadboards would probably be too wonky for audio, so you'd have to use a strip board and solder it, but it should work fine.
    – towe
    Jan 17, 2020 at 11:55

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