Back in the day, I figured capacitors in the signal path were simple. Just slap in the right value and you're good, right? But a messy build last year proved me wrong. The power supply decoupling was off, and it introduced all this hum. Spent weeks chasing down the right cap placement and types. Totally changed how I see circuit design now.

Yeah read something similar once. They were talking about glycol mixes for industrial lines. Same basic idea as the antifreeze trick.