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I want to play an audio file over VoIP in order that people can listen to it with a phone call. One way to do this would be to set up the audio file as an audio device where the audio starts playing at a specified time.

There are better ways of playing my file over VoIP, but I'm still curious as to how you would set up the audio device that I discuss. What would I do?

You can see this as the reverse of this question.

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How about cating your audio file to your audio device, and use this audio device as input to the VoIP-program?

cat /path/to/my_audio.wav > /dev/audio

If /dev/audio is not the right device, you may find the right device (if using ALSA) with aplay -L.

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If I could upvote this answer multiple times I would! – prateek61 Jun 28 '13 at 13:05

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