I delved, and the built-in soundcard seems to be faulty. It is working but the replay sound of something I've recorded if furry and hissey and crackley. Play-through from the turntable while I'm recording is OK, and pre and previously recorded CDs are fine, but at present the new recordings are dreadful. All God's chillun got problems, but I seem to get more than my share with computers.

And my old soundcards don't fit this new computer. Too long.
Makes you want to spit!