Using clamshell MacBook with external monitor with no speakers - will there be sound? If I connect my MacBook to a monitor with no speakers, and use it in clamshell (with the lid closed) will there be no sound / volume? Or will any sound be muffled becaused the lid is closed?

How will I hear error noises or new mail sounds or music? Will I also have to buy speakers? Or only buy a monitor with built in speakers?
Just tested. It will play through the speakers with the clamshell closed and is very audible. It does change the sound quality so music might be a bit different (I din't play any music), but notifications will be easily discernible.

Tried some music and it comes through quite clearly, just a little quieter than with the lid open.