Hello Jack,
That's quite a while to have it just sitting around. :)
While I forget the specifics at the moment, there is an audio card that has some bugs in its drivers that cause this problem.
This is a rather old issue though, so please try updating to GDT v4 and check then.
Let me know your audio card manufacturer, model number and driver version as well. I can check into it further then.
To get around this problem, you can use an alternate sound device like the one on your motherboard. It doesn't solve the problem, but it gets around it. GDT uses the default audio device that you've selected in the Windows Control Panel. A future upgrade will allow you to select the audio device that GDT uses, making this sort of thing easier to deal with. At the moment you have to do it in the Sounds and Audio Devices applet in the Control Panel.
To do it:
- Click Start > Control Panel > Sounds and Audio Devices
- Cick the "Audio" tab
- Under "Sound Playback" select a different audio device (make sure your speakers are hooked up to it as well)
- Optionally, check the "Use only default devices" checkbox
- Click Apply then click OK
There is another possible problem though that is easily fixable. If you've got your speaker volumes set high, and you have the Gain in GDT set too high, you'll get distortion. This is normal and expected. The gain in GDT is very powerful, and you should generally only ever adjust it by +/-6dB, and maybe as much as 12dB. Check to see the setting in the GDT Controls & Options Window and verify that it isn't set too high. Zero is best in most cases.