Note: these instructions are sketched as I didn't test them. Make sure to have a trial run or two before the Festival.You'll first need to record the message using an audio recording program, such as
Audacity. Make sure to keep a few seconds of silence at the end.
You'll then need to broadcast the message and have it play continuously, which is the fun part (Mumble can not transmit on more than one channel at once, and it's not so simple to have your sound card process two audio streams at the same time). There are at least two possible solutions to these problems.
1) Using two different computersThis is the easy way. Supposing you have two different computers, "A" and "B":
- record the ATIS on A;
- start Mumble on A, click on Settings -> Configuration, choose Line (*) as the input device and Always active as the transmission method, close the window by clicking on OK;
- connect to the Mumble server, create the ATIS channel and join it;
- in Audacity, select "Line" as the output device (so that the ATIS won't be sent to your headphone/speakers), then have the message play continuously (shift + click on the Play button);
- on B, start OpenRadar/Mumble as usual to control your desired airport.
(*) The exact name will vary depending on the soundcard.
If you don't have/want to keep on two computers at the same time, you could use a computer and a virtual machine running on it, or a small server (if you have it).
2) Running everything on the same machine- Install a virtual sound card driver such as VB Cable. Virtual sound card drivers, as their name says, create a software sound card in addition to the real one already present in your system, allowing you to keep the ATIS and ATC sound streams separate. Note: VB Cable is donationware - please follow the license terms and make a small donation to its author.
- We then need to run two separate instances of Mumble at the same time. Start your main instance of Mumble as normal (the one you will be using for controlling). Then, make a copy of the Mumble program folder (C:\Program Files\Mumble) somewhere else (e.g. on your Desktop). Open the copied folder and create an empty file named Mumble.ini in it: this will make the second instance save its settings there (and the existing ones won't be overwritten). Finally, run the second instance of Mumble with the -m command line parameter.
- In the second instance of Mumble, click on Settings -> Configuration, choose the virtual sound card created in the first step as the input device and Always active as the transmission method, then close the window by clicking on OK. Create the ATIS channel and join it.
- In Audacity, select the virtual sound card as the output device, then play the ATIS continuously (shift + click on the Play button). The ATIS will be broadcast on the dedicated channel.
- Use the first Mumble instance to do regular controlling.