How to measure power supply ripple down to 1uv

Get 1 uv accuracy measuring Ripple in HIFI power supplies using a soundcard and your computer.
Us Links
Sound card I am using Focusrite Scarlett 2i2 3rd amzn.to/3jX6u5F
XLR male to RTS Cable 3 ft amzn.to/3xmxNJG
Signal Generator amzn.to/40OKBGi
Canada/ EU Links
Sound card I am using Focusrite Scarlett 2i2 3rd amzn.to/40NUp3x
XLR male to RTS Cable 3 ft amzn.to/40Nexmi
Signal Generator amzn.to/3HUVL3J