> Would you want the Xovers to be fixed (and if so what at),
> scale with output low pass filter frequency or be manually
Ideally, all of the inter-band crossover frequencies should be user-adjustable. That would allow a very useful degree of customization which most other digital processors don't provide.
> I know i am being lazy and could probably find it but anyone
> have any links to images of the NRSC low pass curve. I am
> looking at how many dB down the stopband of the filtering
> needs to be??
Here you go... the shaded area shows the official specification (-15 dB at 10 kHz, and so forth until it reaches -50 dB at 15 kHz), while the curve represents the typical response of an analog NRSC brick-wall filter.
That "bump" at 11 kHz in the stopband is not a mistake -- that was designed to allow some leeway for analog filters which have a bit of spillover in the 10-11 kHz region.
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