Disable/Change notifcation during call

[jac187]

I just updated to the 20755 ROM before that I had 5.2.19716 ROM. This issue is in both and maybe I forgot something but how do you disable (or change) the chime that plays when you receive a text message or low battery indicator while on a call.

Its loud enough that the person I am talking to can hear it as well.

Thanks.