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"WaveIn Open: Invalid device identifier "
Seems like that is telling you it is having trouble playing a wave file because the proper device is not selected.
Try going to CONTROL PANEL
SOUNDS AND AUDIO DEVICES.
See if your soundcard is named in the DEFAULT DEVICE blocks for SOUND PLAYBACK and SOUND RECORDING. If not, do so.
If it is, I'd guess the proper sound drivers for your soundcard may have gotten messed up, and may need to be reinstalled.
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