No... you can only really add up the times when your standby time is at 24 hours since the battery usage list is for the last 24 hours regardless of how much you’ve charged or not. Also, you can only add the screen on time figures, nothing more. It’s mostly a pain in the butt, but it is the only accurate way unless Apple changes the 24 hour list to a “since last full charge” list.
For your times you have 11.5 hours of standby on this charge cycle, but that list includes 12.5 hours of usage time from the previous charge cycle. Honestly you could easily see that the phone adds usage without you touching the screen by just charging it to full, then letting it sit for 6-12 hours. Your apps will do some kind of refresh, a message or two will pop in, and that usage ticker will slowly count up. No music necessary.
