After connecting to the computer with Parallels Access, the sound on the computer is lost.
This behavior is by-design:
When you connect to the Mac using Parallels Access, the output Sound adapter automatically changes to Parallels Virtual Audio Adapter to transfer the sound to the iPad. As the application is designed for the remote control, then there is no ability to use both Audio adapters at the same time.
The workaround is to change the adapter manually (you will need to perform it every time you connect to the Mac computer):
- Start System Preferences
- Open Sound
- Click "Output" tab
- Select "Internal speakers" to fix the sound issue