Turn off outgoing messages sound on MacBook Air
Is there a way to turn off the 'swoosh' sound that happens every time I send a message on my MacBook? It is really frustrating, especially when I am watching or listening to something, and I don't want to have to mute the entire computer just to not hear the swoosh. I know how to turn off incoming notification sounds, but have not seen a way to turn off the outgoing message sounds.
If this option does not exist - why not? I'm the kind of person that keeps my phone on vibrate 100% of the time, turns off keyboard click, etc. I'm not a fan of not being able to turn off all the sounds. Please help.