How to turn off the notification sound?

Question

Android

Hello!
During a call, when notifications (such as a message on social networks) arrive, a DTMF signal is sent to the speaker. It is very loud and you can not hear the interlocutor - annoying. How to turn it off?

Answer 1

No one can interrupt the regular dialer from the phone's firmware by playing sound on the speaker
. If there is, then the jamb of the firmware. Only the beeping of an incoming call on another line can break into a conversation.
If we are talking about a conversation through instant messengers (whatsapp, viber, etc.), then the situation is different.
High-priority notifications may briefly override audio playback, since the operating system
does not know whether this is a conversation or you are listening to music.
Suppose a programmer decided to write a polite application, there is a current conversation - silently, no - with sound. The permission that allows you to find out is shown as "Access to calls".
Paranoid users will be downvoted. Well, the moderators are tightening the screws.