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I am building some home theater integration, using my Mac Mini as a central hub. I have figured out how to use the HTTP or raw TCP/TP commands on my home theater equipment to turn them on, off, volume up/down, etc.

What I would like to do is have a way of displaying a message (mainly the volume of the receiver, "Volume: 58%") when I invoke the controls to increase the volume.

But I can't even figure out what those dialog/notification styles are called, nor how I might be able to display one. (Yes, I could use the notification service, but I'm not happy with it.) (Growl is another option, but that relies on having Growl installed.)

I would most prefer a simple terminal or AppleScript command to display the message.

Any tips?

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