Need MATLAB-friendly device to offer triggerable audio

Hello,
I'm looking for a device that can support the following process:
1) An audio file (or raw signal vector) is loaded onto the device via USB (using MATLAB);
2) When the device receives a trigger (~5V pulse), it plays the audio pretty much instantaneously.
It would be great if the audio could be short (< 100 us), long (minutes), or anywhere in between. (The purpose for this is synchronization to a device that outputs a trigger.) Any ideas?
Thanks!
Alex

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2012-3-9

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