The manual isn't quite clear that analog inputs are not affected by EQ. I have the same question because it seems to be an all or nothing proposition.

Quote from page 31 of the manual:
Note: Because the Model 976’s analog inputs stay analog through and through, the EQ does not aff ect your analog sources. This also means you will want to use an HDMI output from your computer to an HDMI input on the Model 976 should you chose to utilize REW.
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner