Accretion onto the two BHs. Top box: accretion rate as a function of time. The red line is the total accretion rate while the blue and black lines are the accretion rates onto the secondary and the primary respectively. Lower box: Fourier transform of the total accretion rate (lower panel) and of the torques (upper panel). In the upper panel, the green line is the total torque (highest peak normalized to 1) and the red line is the torque exerted by the material at r < a (multiplied by ten).