On the ContourHD 1080p and 720p this is done on the camera itself.
To enable "silent mode":
- With the camera off, slide the record switch to its forward ("record") position.
- Turn the camera on.
- Slide the record switch back to the "off" position.
You are now in silent mode and can use the camera as you normally would (minus the beeps).
To disable the silent mode:
- Turn the camera off.
- Make sure the record switch is pulled back to the “off” position.
- Turn the camera back on.
You should now hear the beeps associated with different camera functions again.