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Micro with audio capability

Hi there, I'm in my final year of Computer Engineering and I am tasked with writing a technical report for a project of my choice.  My project entails having piezo sensors that when activated can output small 1 second mp3 samples.  

I'm looking for a microcontroller/development kit with these basic goals in mind

  • 4-8 inputs
  • Can play sound outputs simultaneously (if button 1 and 2 are pressed at same time, sound samples 1 and 2 are both played at same time) through standard 3.5mm audio jack
  • Fast response
Can somebody help me determine what components might work for this case?

Thanks,
Greg 

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