What's the best sounding volume control?

Volume controls of all kinds affect sound quality in negative ways, some more than others. Is there one type of level control that's better than all others and if so, why? Have a question you want to ask Paul? http://www.psaudio.com/ask-paul/ I am getting close to publishing my memoir! It's called 99% True and it is chock full of adventures, debauchery, struggles, heartwarming stories, triumphs and failures, great belly laughs, and a peek inside the high-end audio industry you've never known before. I plan a few surprises for early adopters, so go to https://www.paulmcgowan.com and add your name to the list of interested readers. There's an entire gallery of never before seen photos too.