I got some white noise when I run Squeezelite and connect my speaker to the 3.5 mm headphone jack. I got the noise when I am not playing but also I can hear it when music is played (within parties with not that much sound, like piano).
I am running on a RP3, with other applications I don’t hear any noise. There are no noise when I stop squeezelite.
I have enabled -C and that solves the problem when I am not playing but when I am playing music I can hear the noise in the background.