Originally Posted by Jim Fogle
Steve,
A old style battery operated media player can do exactly what your asking for and you may already have one onhand sitting in a junk drawer. I'm thinking of something like a Microsoft Zune, Apple iPod or a generic MP3 player.
Every media player I've seen can playback MP3, WAV and MP4a and other audio formats. Almost all also can playback a playlist of audio files.

Plug a cord into the media player headphone jack and never unplug it so you don't have to worry about the jack wearing out.

Make sure you install a fresh battery before every gig. 😁
Jim, we are thinking similarly. A media player might be the way to go, don't have an old one sitting around but that's easy to solve.
And capacity doesn't need to be huge, I can't see us playing more that 20 songs tops.
As others have mentioned, mini output jacks also make me nervous, especially unbalanced ones. A USB connection might be more reliable and is what I use in my home studio.

As far as fresh batteries, I'm thinking that if I design this right the player would be charging while playing its tracks.

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