Tracktion DAW built in sampler would work but you would have to hit different keys on a keyboard. There's a setting so that it's a one-shot, not a looped playback.

Another option is a footswitch enabled app to play back songs. Your songs will be REALLY short.

Try googling the footswitch option. I think you can probably even set up media player to work this way with a play list and a transcriptionist's USB foot pedal.

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