reply to BETWIXT: Yeah, that's what I tried, basic V divider. but, as far as i know, AC signal sees any DC as basic gnd and it's just effectively 47k||47k to ground.
I am using the op-amp as a non-inverting amplifier(I want to use the high input resistance of the op-amp to my advantage).
I made a voltage divider on the non-inv line of an op-amp to pull the input up and tried to amplify it using normal inv amplifier setting. that didn't work.
Added after 19 minutes:
ok, I tried LvWs recommendation...
strangely enough I get a little under 3V DC out, no matter what input I have (signal generated sine wave or mic.)
maybe my values are too high? :
2 x 100k for V divider
1 uF for both caps
560k and 47k for amplification.