If you open a song in Studio One and immediately hear a loud, "squealing" sound, it is likely that your computer contains an internal microphone. Most commonly, this occurs on laptops. If the Audio Device in Studio One is set to your computer's internal sound device rather than your audio interface, this microphone could be picking up a signal from your computer's speakers, resulting in a feedback loop - creating this unpleasant sound.
To rectify this issue, close the song you are currently in an follow these steps:
- Select Studio One at the top on the Menu bar
- Select Options (PC) or Preferences (Mac)
- Select Audio Setup
- Change the Audio Device to your Audio Interface
You should then be able to enter the song without this issue occurring. If you are still receiving feedback, make sure that any microphones armed for recording are not positioned near your speakers, as they could be creating a feedback loop as well.