  We present a recently developed prescription to obtain ready-to-use
gravitational wave (GW) polarization states for spinning compact binaries on
hyperbolic orbits. We include leading order spin-orbit interactions, invoking
1.5PN-accurate quasi-Keplerian parametrization for the radial part of the
orbital dynamics. We also include radiation reaction effects on $h_+$ and
$h_{\times}$ during the interaction. In the GW signals from spinning binaries
there is evidence of the memory effect in both polarizations, in contrast to
the non-spinning case, where only the cross polarizations exhibits
non-vanishing amplitudes at infinite time. We also compute 1PN-accurate GW
polarization states for non-spinning compact binaries in unbound orbits in a
fully parametric way, and compare them with existing waveforms.
