Yes, it's a bit complicated with all these "features"!
There are three buttons on the remote that control the three Audyssey features separately. If Dynamic EQ + Volume is on you get the "green light". If Dynamic EQ is on (w/o Dyn. Vol) you get the "red light". If both of the Dynamic functions are off the light is turned off, but again you can still use the MultEQ filters.
The "MULTEQ" button on the remote will cycle between the different EQ settings. There are three Audyssey target curves (click here for explanation
) which use the Audyssey filters, and then you have the option of "OFF" for no EQ, and "MANUAL" if you'd like to set your own EQ settings with a 9-band graphic EQ.
So, with Dynamic EQ/Volume turned off, use that "MULTEQ" button to toggle between the EQ's. Note that you can disable any of those EQ curves by going to the "EQ Customize" section of the "Audio Setup" menu (see pg 28 of the manual). For example, you can set everything to "not used" except "Audyssey" and then the "MULTEQ" will simply toggle between "OFF" and "AUDYSSEY" and you can compare the effects with a quick A/B switch.