Could this be one reason tubes (and perhaps records) sound better?

lesdomes,
There are white noise generators readily available with volume control, they are used as sleep/work aids. If you have an analog mixer, you could also mix white-noise from a laptop to whatever else you were listening to.

Personally I would not recommend intentionally generate white noise in your listening environment.  There is a difference between what happens in the laboratory environment and your own.  Just because they said so, does not mean it's true.

Lose the vinyl and the CDs and listen to reel to reel tape. It’s all you need.

... which is why experiments are recreated, for validity. I am struggling to see any merit in your advice to someone who wants to experiment.

Go ahead Mr. 24/7 lols.