DIGI+ Pro +Volumio speaker pop


So the problem is that i get very loud pop sound when i start the Volumio and when i change song or radio station. Both coax and toslink make significant pop during those events. Problem cant be amplifer because the pop doesnt occur if i first start the rpi+digi Pro (volumio) and then power on the amplifer. Can someone help me before i break my speakers with loud pops.

So is there is any way in Volumio to make sure the system always sends data, even if no music is playing.

Ps. Sorry for My bad english

Update: all pops and crackles are gone since i changed from software mixer to none. Is there any way to make software mixer to work without pops?