123. There is no sound when I try to preview my audio harmonies in the TC-Helicon window.

The preview feature in the TC-Helicon audio harmony plugin uses the sound device selected in your Windows operating system settings. Go to the Control Panel | Sounds and Audio Devices | Audio tab, and make sure the appropriate audio driver is selected for sound playback. For example, it's possible that you had selected a different sound card there than you had selected in the PowerTracks program in Options | Preferences | Audio | Drivers, and you only have speakers connected to the one sound card. That explains why you might hear audio in PowerTracks, but not in the TC-Helicon plugin.

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Alyssa - PG Music