[BC] ...Seriously pal?...

[Steve Schoon]

Mix it into your recordings 180 degrees out of phase, and presto!  Instant
noise cancellation!

(yes, I'm kidding)

For $20, your production director can now have a plug-in that puts noise
back in to his/her recordings -- air conditioners, demagnetizers, neon
lights etc -- effectively undoing all that critical construction we insisted
upon to make the recording environment as noise-free as possible.