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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!

  • 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 at 7:36
  • Arduino Uno / ATMEGA328P with an MP3 player module perhaps – towe Jan 17 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 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 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 at 11:55
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Any portable MP3 player on the market will have loop capabilities. Just find one with a 3.5mm jack. All of them will have a battery as designated by the "portable" portion of their name, but you can just have it plugged in "charging" all of the time. You could probably pick up an old Apple iPod for cheap on eBay. You could also use a Raspberry Pi and software like VLC.

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