I have my OS sound effects settings set to mute. I don't want my computer making noises unless they are totally intentional on my part. I use my MacBook to run backing tracks for our band. The truth is, we could be in a situation in which my computer is hooked up running a loop or a soft synth, and... Bunk-Chunka-Dunk-Dunk-Dee-Dunk-Dugga-Dunk-Duh! I can't imagine how horrible it would be if Marimba suddenly started blaring over our sound system right in the middle of a soft song... Is there a way to disable the sound? I actually think that there should be a (none) choice when choosing a ringtone, even on iOS 8. Maybe a terminal command? I would even be willing to find the ringtone file and replace it with a blank audio file. Any ideas?