do not disturb mode

So I've literally wasted about 2 hours of my life on this. I have "favorites" selected so that they can ring in on my phone when I turn the "do not disturb" on but when I turn on the mute button on the side of the phone they still ring in. Is this the case and the way it's supposed to be? I...

What to do about phone calls interrupting music? I've tried literally Everything to silence phone ringing during music playback. I put phone switch in silent mode, Airplane mode, vibrate only, Do Not Disturb mode allowing calls from no one and silence always tab selected. What gives? I'm a DJ...