Yep, i read a similar article recently about turning down the gain of the audio amp.
As much as this 'bandaids' the problem, it's not really a fix.
There's still a reason WHY the amplifier (at original high-gain) is so succeptable to picking up the hum and passing it thru.
Call me old fashioned, but i like to ELIMINATE problems, not
cover them.
MM.
