Commercials are double-squashed via compression techniques in order to make 'em the loudest thing on the dial. Some channels overdo that more than others, just to make it worse.

It might be a bit on the expensive side, but a Line Level Audio Compressor (hardware) inserted in the chain and set up as a soft knee limiter may be able to help you iron out level changes like these.

But before going to that extreme, check out your possible Audio Outputs on that set, you may just have other output options, such as a fixed Line Level.


--Mac