if your stereo amp still works flawlessly it’s probably fine. But using an external Dac is definitely recommended. The inside of a PC is kind of an electromagnetic mess. Not as much an issue for digital on/off, but very much an issue for analogue audio signals. On top of that, the dac on the motherboard probably isn’t a very good one either. But you don’t have to go overboard. There are pretty good options at almost any price point.

wdym the lossless streaming services don’t sound as good as CDs??? do you know what lossless means?