recording voicemail from computer

i have a audio file and i want it to be my voicemail message when people call me.
i dont want to just play on the speakers and record it.
im trying to figure out a way to plug up either my mac or stereo with either a wire or bluetooth to my curve to record my voicemail message.
i have att.
are there programs?

I use YouMail from youmail.com and you can upload your Voicemail greeting and even have a different message for different people. Check it out!

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