David wrote:
wrote:
All AM stations use _at least_ the required NRSC equalization, and
virtually all broadcast stations, AM, FM, or TV, use multiband audio
processing, which is in itself a kind of adaptive, dynamic equalization.

There's an NRSC ''Mask'' which is used to keep the sidebands within
limits but no requirement to use any preemphasis, unlike the FM
standards.

TV standards also require preemphasis IIRC. But you're right about AM.

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