I don't know if it's related to "output jack quality" like topics, so I'll post and explain.
I've noticed random, quite frequent audio distortion like crackling/hopping/popping during playing sound, no matter the output (jack, bluetooth, speaker) and no matter the application. Sometimes it can be noticed during volume changing. Some people wouldn't even notice it, but to another ones that listen to a lot of music may be even frustrating (like me). I'd say it's a purely software problem that should be fixed. Anyone else has this problem?