Signal Biasing for inverting op-amp using virtual ground?

I am building an equaliser circuit, with an op-amp at the output. I am using a single-ended 18 V power supply, but the op-amp (TL071) requires a bipolar power supply. I used a voltage divider to supply +9 and -9V and a virtual ground to the op-amp. Do I need to add a DC bias to the input signal to match the virtual ground (9V)?