Agree! I could do this with my eyes closed if not for that. A simple "bip" noise or something.

There is an option under cue sounds, if you're using a phone I think you might need to take it off silent :) Let me know if that works.

No, I think you're possibly misunderstanding the issue. That option you mention allows one to change the sound used, which I suspect we all get, but instead the problem is there's no sound between breathing in and breathing out. You need three audible cues not two.

Got it, this should be fixed now! My apologies :)